<prompt> Which of the following nerves are affected after Spinal anaesthetic block?Motor and sensory nerve onlySensory and autonomic nerve onlySensory nerves onlySensory, autonomic, and motor nerves  <response>: Ans. d Sensory, autonomic and motor nerves Ref: Synopsis of Anaesthesia by Lee, 12th edition; p. 690.As a general rule of thumb, the greater the diameter of the nerve fibre, the greater the concentration of LA required to produce conduction blockade. Small unmyelinated fibres are more vunerable to blockade than large myelinated fibres. Sequence of nerve blockade by LAAutonomic -Sensory - Motor Sequence of recover from LAMotor -Sensory -Autonomic Sequence of sensory fibers blockade by LATemperature -Pain -Touch -Deep pressure -Proprioception 