This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Local and Regional Anesthesia, Subject name: Anaesthesia
Which of the following nerves are affected after Spinal anaesthetic block? 
Select and explain. 
A. Motor and sensory nerve only, B. Sensory and autonomic nerve only, C. Sensory nerves only, D. Sensory, autonomic, and motor nerves
D: Sensory, autonomic, and motor nerves
Answer: D: Sensory, autonomic, and motor nerves 
Explanation: 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