lecture 3: spinal chord anatomy

Question 1

divisions of spinal chord

Answer 1

• cervical nerves (8): contain cervical enlargement where arm nerves meet
• thoracic nerves (12): correspond to ribs
• lumbar nerves (5): chord stops and spaghetti fibres begin, branching off from the lumabr vertebrae
• sacral nerves (5):
• coccygeal nerves (1):
• total 31 paired nerves

Question 2

filum terminale (externum and internum)

Answer 2

intenral is inside sub arachnoid space. the string as a whole anchors the spinal chord to prevent it from moving whent he rest of the body moves

Question 3

pseudo unipolar neuron purpose

Answer 3

• tell where positioning in space
• environmental change e.g temp, pressure
• myelianted with fast conduction at 50m/s

Question 4

encapsulated neuron ends in periphery

Answer 4

• meissner’s. corpuscle: touch
• paccinian corpuscle: pressure

Question 5

free ended peripheral nerves

Answer 5

• pain and temperature
• unmyelinated with slow conductio at 1m/s