Nasal triangle is -
(All of the above) (Internet)Kiesselbach's plexus, which lies in Kiesselbach's area, Kiesselbach's triangle, or Little's area, is a region in the anteroinferior part of the nasal septum where four arteries anastomose to form a vascular plexus of that name.The arteries are:* Anterior ethmoidal artery (from the ophthalmic artery)* Sphenopalatine artery (terminal branch of the maxillary artery)* Greater palatine artery (from the maxillary artery)* Septal branch of the superior labial artery (from the facial artery)Ninety percent of nose bleeds (epistaxis) occur in Little's area, as it is exposed to the drying effect of inspiratory currentThe danger triangle of the face consists of the area from the comers of the mouth to the bridge of the nose, including the nose andmaxilla. Due to the special nature of the blood supply to the human nose and surrounding area, it is possible (although very rare) for retrograde infections from the nasal area to spread to the brain.This is possible because of venous communication (via the ophthalmic veins) between the facial vein and the cavernous sinus. The cavernous sinus lies within the cranial cavity, between layers of the meninges and is a major conduit of venous drainage from the brain.It is a common misconception that the veins of the head do not contain one-way valves like other veins of the circulatory system. In fact, it is not the absence of venous valves but the existence of communications between the facial vein and cavernous sinus and the direction of blood flow that is important in the spread of infection from the face. Most people, but not ail, have valves in the veins of the faceSoft triangle is the area of the top of the triangle-shaped nostrils which has no cartilage and only consists of skin. Damaging this area duringincisions on the nose can cause scarring and notching, and should be avoided.The danger triangle consist of the area from the corners of the mouth to the bridge of the nose, including the nose and maxilla.* Sphenopalatine artery also called the artery of epistaxis.* The ostiomeatai complex consists of a narrow cleft between uncinate process and bulla ethmoidalis and comprising of ethmoidal infundibulum, maxillary ostium and frontal recess.* The olfactory area is considered as the dangerous area of nose as the infection from this area can be carried through the cribriform plate to the anterior cranial fossa.* The angle formed by three semicircular canal is solid angle.* Trautman's triangle - bounded by the bony labrysinth anteriorly, signoid sinus posteriorly and dura superiorly, weakest part, commonest site for extradural abscess.* Gradeniogo's syndrome - Triada) External rectus palsy (Vlth nerve palsy).b) Deep seated ear or retro-orbital pain (Vth nerve involvement).c) Persistent ear discharge (Otorrhea).* Gresingerfs sign - Inflamed swelling and oedema in the middle of the posterior border of the mastoid seen in Lateral sinus thrombosis (picket fence fever).
Includes vestibule of nose
From comers of mouth
Extends to the bridge of nose
All of the above
Nose and PNS