Spinal Cord

Question 1

Spinal cord development

Answer 1

• Up to 8 weeks: cord and vertebrae same length, spinal nerves run directly with corresponding somites
• After 3rd month: vertebrae elongate, cell bodies for spinal nerves are at higher vertebral level than the structures they innervate

Question 2

Enlargement locations

Answer 2

• Cervical: C5-T1

- Lumbosacral: L1-L3

Question 3

Filum terminale formed by

Answer 3

Pia Mater

Question 4

Lateral Column

Answer 4

• Autonomic Efferent
• T1-L2: intermediolateral column (sympathetic) constitutes thoracolumbar outflow
• S2-S4: parasympathetics, give rise to pelvic splanchnic n

Question 5

SG of Rolando, DLT of Lissauer, and Nucleus Proprius extend

Answer 5

-Entire length of spinal cord

Question 6

Dorsal Nucleus of Clarke (Nucleus Thoracis)

Answer 6

• Present in T1-L3/L4
• Occupies Laminae VII
• Concerned with info from muscle spindles and tendon organs (proprioception)
• Large Neurons

Question 7

Visceral Afferent Nucleus

Answer 7

• Anterolateral to DNC
• Contains autonomic neurons
• Afferents: visceral afferents
• Extends from T1 to L3
• Medium sized neuron

Question 8

DNC and Visceral Afferent Nuclei extend

Answer 8

T1-L3

Question 9

Posterior Funiculus

Answer 9

• Contains dorsal column-medial lemniscus pathway

- Concerned with fine touch, vibrations, two point thresh, and proprioception from the skin and joints

Question 10

Where does Arachnoid mater end

Answer 10

S2

Question 11

Pia mater adherent to the surface of spinal cord by

Answer 11

Pia-glia membrane

-Attached to dura by denticulate lig

Question 12

Leptomeninges

Answer 12

• Pia and arachnoid

- Derived from neural crest cells

Question 13

The two post spinal a and 1 anterior, also the 2 spinal veins are located

Answer 13

In subarachnoid

Question 14

Spinal A begin as branches of the

Answer 14

Vertebral A

Question 15

Largest segmental A

Answer 15

artery of adamkiewicz
Aka radicularis manga
Around T9

Question 16

Venous plexus is

Answer 16

In Epidural space

Question 17

Dorsal and ventral roots are initially in the

Answer 17

Subarachnoid space, then contained in rural sleeve, which is cont with epineurium

Question 18

Dorsal root ganglia lie

Answer 18

Within the intervertebral foramen

Question 19

Dorsal and ventral rami supply

Answer 19

• Dorsal: sensory and mortor to epaxial muscles and skin on back
• Ventral: sensory and motor to hypxial muscles and skin on the rest of the body

Question 20

Cauda equina

Answer 20

• Made up of pure nerve roots
• Ganglia lie in sacral and intervertebral foramina
• Only distal to foramina is there mixed spinal nerves