the invention relates to laparoscopic implantation of neuroelectrodes on laparoscopically identified nerves and / or nerve strands to allow stimulation of those nerves and / or modulation of signals carried by those nerves . laparoscopic procedures are particularly effective at identifying nerves in the pelvic area and implanting electrodes at nerves in that area , and the present invention is useful , for example , for restoring normal bladder function , restoring function of the muscle groups which allow a person to stand and the like . in addition , laparoscopic implantation of electrodes can be used to modulate signals through or from certain nerves to mediate or block pain . preferred embodiments of the invention are discussed below in connection with restoration of bladder function , restoration of function of the gluteal muscle group , and modulation of pain signals . in connection with one aspect of the invention , laparoscopically implanted electrodes are used to restore normal bladder function to a patient who has lost this function , a condition which is referred to herein as a neurogenic bladder . normal function of the bladder involves contraction of the bladder muscle during voiding , and relaxation of the bladder muscle at other times . further , the bladder sphincter normally relaxes , or at least does not contract , during voiding , and contracts at other times . these functions are controlled by the central nervous system , and conditions affecting the nervous system can interfere with proper bladder function . for example functional disorders occur in paraplegia patients who normally have a hyperactive bladder . the bladder in these cases is overactive during filling , and during voiding or urination , both the sphincter muscle and the bladder contract simultaneously . this creates a dangerous condition wherein excessive pressure creates risk of damage to the kidneys . according to the invention , electrodes are implanted at specific roots of the sacral nerve and are operated to produce desired bladder function . fig1 schematically illustrates a system according to the invention implanted in a human abdomen for controlling bladder function . according to the invention , electrodes 10 are implanted in communication with specific roots of the sacral nerve 12 . an external power source 14 is provided in this embodiment and communicated with electrode 10 through a receiver 16 , which is also implanted in the patient for receiving signals to operate electrodes 10 . a controller 18 can be used to issue control signals and power signals through a transmitter 20 to communicate with receiver 16 and thereby operate electrode 10 as desired . it should be appreciated that the configuration as shown in fig1 advantageously positions the electrode and related wiring and receiver within the pelvic area , which avoids problems associated with other configurations as described above . it should be appreciated that external power source 14 could be a battery or any other readily available external source of power , and especially a source of a power signal which can be sent to an internal receiver , for example using radio frequency signals . it has been found that the bladder and bladder sphincter muscles are controlled by nerves which run through the sacral spinal nerve . further , current laparoscopic technology allows the sacral nerve to be differentiated to identify different sacral roots , referred to as s 1 - s 5 . if there is any doubt as to identification of the sacral roots , electrostimulation can be used to confirm identification . this identification is used in the present invention to allow stimulation of specific sacral roots to restore or otherwise influence certain functions of the body . fig3 schematically illustrates a bladder 22 , sphincter 24 and sacral nerve 12 . all different sacral nerve roots also contain fibers for bladder contraction and for contraction of the sphincter of the bladder . the main fibers for the sphincter have been found in the sacral nerve root s 2 , while the main fibers for bladder and rectum contraction are found in the sacral nerve roots s 3 , s 4 and s 5 . the aim is to produce an isolated contraction of the bladder without concomitant contraction of the sphincter . this is not feasible when electricity is applied on the entire sacral nerve roots together . according to the invention , three different options are provided for producing an elective contraction of bladder 22 without simultaneous contraction of sphincter 24 during electrostimulation . fig4 illustrates one option in accordance with the invention , specifically , the elective stimulation of the pelvic parasympathetic nerves of the bladder and the rectum . fig4 shows sacral nerve 12 separated into its different roots s 1 , s 2 , s 3 and s 4 / 5 . in this approach , electrodes ( schematically illustrated by wires 26 , 28 , 30 ) are attached to s 2 , s 3 and s 4 / 5 . in order to selectively contract the bladder in this embodiment , selective stimulation can be directed to s 3 and s 4 / 5 to cause contraction of the bladder as desired . when it is no longer desired to have the contraction of the bladder , stimulation of s 3 and s 4 / 5 can be stopped during the filling phase of the bladder . during voiding of the bladder , the selective stimulation of s 3 and s 4 / 5 allows contraction of the bladder without contraction of the sphincter ( which is mainly controlled through s 2 ). fig5 illustrates a second option , similar to that illustrated in fig4 , but wherein sacral nerve roots s 3 and s 4 / 5 are cut distally after emergence of the parasympathetic nerves which permit an elective stimulation of the detrusor by stimulation of the sacral nerve roots s 3 and s 4 / 5 . this approach allows such stimulation without concomitant stimulation of the pudendal nerve , thus without contractions of the sphincter nor muscles of the lower limbs . since the sacral nerve root s 2 , which contains the major fibers for the sphincter , is kept intact under this approach , elective stimulation of s 3 and s 4 / 5 without stimulation of s 2 produces electrical induced micturition , without incontinence during the filling phase of the bladder . further , since s 3 and s 4 / 5 are not critical in connection with the functions of standing up and locomotion , no substantial side effects occur due to the distal transaction or cutting of the s 3 and s 4 / 5 sacral roots . thus , option 2 advantageously allows for the same elective stimulation of the parasympathetic nerves as set forth in the approach of fig4 , but has the further advantage of avoiding unwanted contraction of the sphincter and / or muscles of the lower limbs during electrically induced micturition . turning to fig6 , a third option is provided and illustrated in accordance with the present invention . in this option , stimulation of nerve roots s 3 and s 4 / 5 can be implemented when desired for micturition , along with a simultaneous stimulation of a blocking signal of the pudendal nerve . by blocking signals through the pudendal nerve , the same result of the option illustrated in fig5 can be accomplished , without the need for cutting the sacral nerve roots . as will be discussed further below , it is an aspect of the invention to use electrodes to issue a modulating signal to certain nerve roots . in this embodiment , an electrode can be used to modulate or neutralize signals carried by the pudendal nerve and , thereby , accomplish the same result as is accomplished in the embodiment of fig4 , but without having to cut s 3 and s 4 / 5 . it should of course be appreciated that in each of the above - described approaches , electrodes communicated directly with specific sacral nerve roots are used advantageously to electrically induce the proper conditions for micturition , specifically , an elective contraction of the bladder without simultaneous contraction of the sphincter . thus , according to the invention , laparoscopic differentiation of the sacral nerve roots s 2 , s 3 , s 4 / 5 , along with elective implantation of electrodes on each of these sacral nerve roots , and further with optional selective distal transection of the sacral nerve roots containing parasympathetic fibers for the detrusor or bladder muscle wall and for the rectum , allows different kinds of bladder voiding to be obtained . specifically , this includes a per - stimulus micturition by elective isolated stimulation of the sacral nerve roots s 3 and s 4 / 5 on both sides of the body . in situations where a per - stimulus micturition is unable to completely void the bladder , a concomitant stimulation of all sacral nerve roots s 2 - s 4 / 5 could be able to produce a post - stimulus micturition as in the classic brindley bladder , or isolated stimulation of s 2 could be enough for opening the sphincter followed by a continuous stimulation of s 3 and s 4 / 5 for full emptying of the bladder by a continuous stream . laparoscopic implantation of an electrode for neuromodulation ( quadripolar electrode ) on the sacral nerve roots s 2 to s 4 / 5 could be an alternative to the “ surgical deafferentation ” discussed above which induces the loss of ejaculation and erection in paralyzed patients . in this approach , a single multi - pole electrode can be attached functionally separately to each of s 2 - s 4 / 5 and optionally also to s 1 . this electrode can be used to modulate any combination of s 2 - s 4 / 5 which is necessary in order to prevent contraction of the bladder during filling . during voiding or micturition , specific poles of the electrode can be operated to induce the desired actions of the bladder and sphincter as described herein . the electrodes , after implanting , must be powered and also controlled to emit the desired signal or stimulus to the nerve . according to the invention , the power source for the electrode can be external , or can be implanted along with the electrode , preferably as a single structure . if the application of the device concerns neuromodulation ( e . g . pain therapy ), only low voltages are necessary for the electrode , and low energy consumption occurs . typical parameters include 8 - 10 volts , about 25 hz , and 250 microsecond pulses . for such an application , a battery ( e . g . pacemaker battery , type itrel 3 , supplier medtronic ) is implanted along with the electrodes . in the case of re - establishment of body functions , e . g . motions of paralyzed patients , higher voltages ( 20 - 30v , 30 hz ) are required which would be problematic for implanted batteries . here , electrical energy is transmitted from the external via radio frequency signals , for example from transmitter 20 to receiver 16 . further , in this embodiment , a battery would not be necessary since the stimulation would not be permanent — as in the case of pain therapy — but instead energy is applied only when needed , e . g . for emptying the bladder . a receiver is also provided , and preferably implanted in the patient to receive control signals which can be generated by the patient or caregiver , for example using some form of control unit . the receiver is operatively communicated with the electrodes to provide signals to the electrodes as desired . according to the invention , wiring between the electrodes and / or power source or receiver can be safely passed through the pelvic region , also using laparoscopic techniques , which are much more user friendly than other surgically installed electrodes and / or wiring . according to another aspect of the invention , laparoscopic implantation of electrodes can be used to restore pelvic or leg functions . in one aspect of the invention , electrodes are implanted to restore the functions of standing up and walking . before a paralyzed patient can walk , he must be able to stand up and remain standing . the most important muscle activity is the contraction of the buttock muscle . in order to stimulate such muscles , placement of electrodes in a friction , pressure or sitting area must be avoided . incisions in the buttock region are also unacceptable . placement of electrodes laparoscopically according to the invention , on the muscle nerves themselves , leads to a homogenous contraction of the whole muscle as desired . the location of the electrodes should not be affected by movement , pressure or friction , and the location must be such that all muscles required for a particular motion are included . stimulation of the gluteal musculature is necessary for the patient to be able to stand up and this presents the main problem . operative access for placement of the electrodes on the nervus glutealis superior and inferior is required . this is an extremely short nerve , and it divides directly at the opening of the foramen ischiadicus magnus into numerous branches . according to the invention , suitable electrodes are placed directly on the development point of these nerves out of the plexus sacralis , in the pelvis . transperitoneal placement of electrodes through laparoscopy enables optimal placement of the electrodes in the pelvis where all the stimulation possibilities necessary for standing up and walking can be recorded and / or produced with only a small amount of effort . for paralyzed patients , anesthetic is not generally even needed since the lower extremity regions are no longer sensitive . electrodes for controlling the gluteal musculature are preferably placed on one or more of the nerves discussed below . an intrafascicular neurolysis is performed on the nervus femoral , which is a nerve with mixed functions , as only the motoric fibers should be stimulated . the motoric fascicule is differentiated from the sensitive fasciculation with the aid of neurostimulation . the nerves identified for treatment with electrodes include the nervi glutei inferior and superior , the musculus iliopsoas nerve , and the plantar flexion nerve . an interfasciculator neurolysis is also performed and the fibers of the nervus peroneus are isolated with the aid of neurostimulation . placement of electrodes is performed on both sides of the body . as with the embodiment dealing with bladder function discussed above , electrodes used in this aspect of the invention are preferably implanted , and powered with a suitable , preferably external , power source for same , and also along with a receiver for receiving commands for the electrodes , and any wiring needed to communicate these elements . turning to another aspect of the invention , neuromodulation for pain therapy is also readily accomplished according to the invention . neuromodulation is based upon the fact that pain information is transported through one or several nerves to the brain . the analgesic aims at blocking the information flow on the way between the point of pain and the brain . neuromodulation cannot block this pain information , but modulation of the information can neutralize the signal and prevent the patient from centrally receiving the pain information . of course , the method of the present invention requires that the electrode be placed between the stimulus which produces the pain information and the central nervous system . all nerves which transmit the pain information must be included in the neuromodulation in order for the method to have the desired effect . as set forth above , pelvic nerves can now be reached by laparoscopy . since all nerves of the lower extremities and the pelvis must reach the sacral spinal cord , the numerous leg nerves in the pelvis concentrate eventually only on the nervus obturatorius , the nervus femoralis , genitofemoralis , ilio - inguinalis , the nervus ischiadicus , the plexus sacralis and the nervus pudendus . laparoscopic implantation of electrodes can reach each of these nerves , including some which lie deep within the pelvis , well hidden behind vessels , and in locations which are unreachable through other techniques . placement of a single electrode on the nervus femoralis and a further one on the nervus ischiadicus , for example , includes all “ pain nerves ” which are relevant in therapy for phantom pain after amputation . placement of electrodes on the sensitive nerves in the pelvis ( plexus hypogastricus inferior , nervi hypogastrici inferiors , trunci sympathici , nervus ilio - inguinale , nervus genitofemoralis , and the like ) can also serve to fight lower abdominal pain . also as set forth above , the power source for implanted electrodes for neuromodulation according to the invention is preferably also an implanted device , and the electrode and power source can advantageously be implanted together . it will be appreciated that the process of the present invention can be used in all situations of pelvic pain , pelvic neuralgias and / or pelvic dysfunctions . these include phantom pain after amputation or other trauma to the lower limbs , polyneuropathy of the lower limbs due to diabetic , idiopathic , alcoholic , auto immune , post - chemotherapy and other conditions , pudendal neuralgia / alcock &# 39 ; s canal syndrome , sciataligia , neuralgia of the branches of the sciatic nerve , neuralgia of the ilio - inguinal nerve / ilio - hypogastric nerve / genital femoral nerve , neuralgia of the femoral nerve , central or lateral pelvic pain syndrome , secondary to pelvic surgery ( neuromodulation of the hypogastric plexus superior and / or inferior ), interstitial cystitis , neurologic impotence / anejaculation , bladder hyperactivity with pain from multiple sclerosis / multi focal encephalopathy , bladder / rectum incontinence , spina bifida , myelomeningocele and numerous others . two examples are outlined below which illustrate fibroscopic implantation of neural prostheses on pelvic nerves in accordance with the present invention . these procedures were carried out to perform neuromodulation of pelveo - abdominal nerves . in situations of pelvic pain / neuralgia , after surgical treatments , symptomatic medical treatments are widely indicated and neuro - electrotherapy is also an option . actual electrotherapy is based upon the direct neuromodulation of the nerves by an implantable device at the level of the spinal cord , the sacral nerve or directly on the peripheral nerves of the lower limb . however , even when considerable development in the electrodes and implantation techniques was accomplished , the indication of the effect of neuromodulation on the pelvic nerves remained limited . in all reported techniques , the implantation of the electrode is done mostly by blunt percutaneuous and puncture and implantation in deep placed nerves such as the sciatic nerve or the pudendal nerve in their endopelvic pathways . since most conventional devices are built with just one or two channels , peripheral neuromodulation should involve at least two nerves at the same time , but never more than is required for the desired procedure . a laparoscopic procedure was used to approach the pelvic nerves for implantation of electrodes on their endopelvic pathways . because quadropolar electrodes are authorized for peripheral nerve neuromodulation and pain situation and are easy to use by laparoscopy , the procedure of the present invention in connection with the sciatic nerve , the pudendal nerve , all sacral nerve roots before or after emergence of the pelvic splanchnic nerves or on pelvio - abdominal nerves as the genital femoral , ilio - inguinal and ilio - hypogastric nerves , or the hypogastric plexus also becomes feasible . testing was started with this field of patients after failure of all other classical techniques of pain management , including failure or contraindications for classical technique of nerve stimulation . the first implantation was done in a 58 year old female for treatment of neuralgia of the genitofemoral and ilio - inguinal nerves secondary to a previous herniorraphy and for treatment of a unilateral pudendal neuralgia secondary to a radical hysterectomy and pelvic irradiation for endometrial carcinoma . one electrode was placed on the genitofemoral , the ilio - inguinal and the hypoinguinal nerves together and a second electrode was placed on the sacral nerve roots s 2 , s 3 and s 4 / 5 . the second implantation was performed on the endopelvic portion of a sciatic nerve in a 72 year old male for treatment of refractory phantom pain and neuralgia of the posterior cutaneous nerve after leg amputation . neuromodulation induced in both patients a permanent reduction in pain without need of any further medical treatment . requests from patients in situations where classic pain therapies have failed or been accompanied by unacceptable side effects have led to further indications for this procedure . the sacral nerve roots procedure of the present invention produced unexpected excellent results for treatment of diabetic polyneuropathy of the lower extremities , refractory interstitial cystitis and pelvic pain / neuralgia secondary to rectum resection , radical prostatectomy or radical hysterectomy . according to the invention , neuromodulation of the sacral nerve roots is used to cure concomitantly pelvic / lower limb neuralgias and bladder / rectum dysfunctions in patients with multiple sclerosis or spina bifida . the subject matter of the present application was also introduced to the field of functional electrical stimulation , or fes , for recovery of functions in paralyzed patients . on apr . 27 , 2006 , a finetech - brindley bladder controller was implanted on the endopelvic sacral roots in a th8 completely paralyzed female who had previously undergone the removal of a brindley controller due to an arachnoiditis after an extrathecal implantation with an intradural sacral deafferentation . because no laminectomy is required for implantation of the electrodes , the present procedure does not expose the patient to a risk of arachnoiditis or of spinal liquid leakage . thus , electrostimulation permits a post stimulant emptying of the bladder for the patient , as in the classic brindley technique . delivery of the patient occurred on the fourth postoperative day . it should be appreciated that , according to the invention , electrodes are advantageously implanted into patients suffering from a neurogenous bladder , paralysis , and the like , in order to at least partially restore a normal function of the afflicted area . this is done in a manner which avoids radical surgery and its inherent risks . it should also be appreciated that the present detailed description of the invention is given in terms of preferred embodiments of the invention , and that various modification of steps , parts and the like would be readily apparent to a person of skill in the art , and that such modifications are considered to fall within the broad scope of the present invention .
a method for altering operation of a nerve related to a given body condition includes the steps of identifying at least one nerve root of a nerve related to the given body condition ; laparoscopically implanting at least one electrode on the nerve root ; and operating the electrode to electrostimulate the nerve root and alter operation of the nerve .