Nervous system

Question 1

Number of spinal nerves

Answer 1

31

Question 2

Number of cranial nerves

Answer 2

12

Question 3

Efferent axons

Answer 3

exit via ventral roots

Question 4

Afferent axons

Answer 4

Axons enter cord via dorsal roots and synapse in dorsal horn.

Question 5

Actual and Potential spaces (Epidural)

Answer 5

Actual: b/t periosteum and dura mater

Potential: b/t skull and DM

Question 6

Actual and Potential spaces (Sub dural)

Answer 6

Potential : b/t Dura and arachnoid mater

Question 7

Actual and Potential spaces (arachnoid)

Answer 7

Actual : b/t pia and arachnoid

Question 8

Thickening of Pia along lateral spinal cord. Connects at intervals to dura. Supports spinal cord.

Answer 8

Denticulate ligament

Question 9

Connective tissue anchor for spinal cord. Specialization of pia, tethers cord to coccyx.

Answer 9

Filum Terminale

Question 10

Innervates joints of spinal column , back muscles and skin of back

Answer 10

Dorsal Primary Ramus

Question 11

Innervates lateral trunk and extremities

Answer 11

Ventral primary ramus.

Question 12

Cervical plexus

Answer 12

C1-C5

Question 13

Brachial Plexus

Answer 13

C5-T1

Question 14

Lumbosacral Plexus

Answer 14

L1-S4