Spinal Cord

Question 1

What is the Bell-Magendie Law?

Answer 1

When the Sensory nerves are afferent via the dorsal horn, and the motor nerves are efferent vis the ventral horn. The muscle nerves come in through the dorsal roots…(SAME DAVE)

Question 2

Skin related to a particular dorsal root is a…?

Answer 2

dermatome

Question 3

How many dermatome types are in the body?

Answer 3

4 - cervical - back of head, and neck, arms and top of arms, lumbar - front and back torso, and back of arms, thoracic - front of foot, leg to the hip, sacral - bottom of feet and back of legs to knee (imagine the body on all fours)

Question 4

What are myotomes?

Answer 4

Muscle and nerves that work together from the spinal cord; muscle is innervated with by the output of 1+ spinal segments