In spinal anaesthesia the drug is deposited between:
Local anesthetic is injected into sub arachnoid space between L2-3or L3-4 below the lower end of spinal cord. The drug acts on nerve roots. From padmaja 4th edition Page no 205
Dura and arachnoid
Pia and arachnoid
Dura and veebra
Into the cord substance
Anesthesia