Spinal Cord 1

Question 1

Which spinal segments are enlarged?

Answer 1

Cervical (C5-T1)

Lumbar (L1-S2)

Question 2

What level does fetal spinal cord extend to?

Answer 2

L3

Question 3

Describe the spinal cord arteries.

Answer 3

One is Anterior

Two are posterior (tortuous)

Question 4

Somite origins & outcome

Answer 4

Dermatomes- Dermis
Myotome- Muscle
Scleratome- Skeletal

Question 5

Compare & Contrast dermatomes & peripheral nerve fields

Answer 5

multiple dermatomes combine to form peripheral nerve fields

Question 6

Dermatome C2

Answer 6

Back of head

Question 7

Dermatome C6

Answer 7

Thumb & Index finger

Question 8

Dermatome T4

Answer 8

Nipples

Question 9

Dermatome T10

Answer 9

Umbilicus

Question 10

Dermatome L3

Answer 10

Kneecap

Question 11

Dermatome S1

Answer 11

Lateral foot

Question 12

Describe limb rotation

Answer 12

Thumbs rotate laterally, Big toes rotate medially

pre-axial - flexors
post-axial - (remain) extensors

Question 13

dorsolateral fasciculus

zone of lissauer

Answer 13

gateway for pain

contains finely myelinated & unmyelinated axons originating in substantia gelatinosa and involved in sensory modulation

Question 14

nucleus proprius

Answer 14

Located on dorsal horn, origin of spinothalamic tract, relays pain & temperature

Question 15

nucleus dorsalis (clark)

Answer 15

C8-L3, spinocerebellar tract

senses condition of muscle (position & stretch)

Question 16

IML

Answer 16

sympathetic origin

Question 17

medial & lateral motor nuclei

Answer 17

medial and lateral structures tend to be innervated by medial and lateral motor nuclei respectively

Question 18

Free nerve endings

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 18

• encapsulated? NO
• slow vs. fast? SLOW
• function? PAIN/TEMP
• distribution? DEEP SKIN

Question 19

Merkel’s Disc

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 19

• encapsulated? NO
• slow vs. fast? SLOW
• function? TOUCH
• distribution? EXTREMITIES, GENITALIA, LIPS

Question 20

Hair Follicles

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 20

• encapsulated? NO
• slow vs. fast? FAST
• function? TOUCH
• distribution? HAIRY PLACES

Question 21

Meissner Corpuscle

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 21

• encapsulated? YES
• slow vs. fast? FAST
• function? 2 POINT DISCRIMINATION
• distribution? HAIRLESS SKIN, FINGERTIPS, JOINTS, LIGAMENTS

Question 22

Pacinian Corpuscle

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 22

• encapsulated? YES
• slow vs. fast? FAST
• function? VIBRATION
• distribution? EXTREMITIES, PALMS, MESENTRIES, PERITONEUM

Question 23

Ruffini Ending

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 23

• encapsulated? YES
• slow vs. fast? SLOW
• function? STRETCH, PRESSURE
• distribution? DERMIS

Question 24

Joint Receptor

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 24

• encapsulated? YES
• slow vs. fast? SLOW
• function? JOINT POSITION
• distribution? JOINT CAPSULES, LIGAMENTS

Question 25

Neuromuscular Spindle

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 25

• encapsulated? YES
• slow vs. fast? SLOW
• function? LIMB MUSCLE, STRETCH/LENGTH
• distribution? MUSCLES

Question 26

Golgi Tendon Receptors

• encapsulated?
• slow vs. fast?
• function?
• distribution?

Answer 26

• encapsulated? YES
• slow vs. fast? SLOW
• function? MUSCLE TENSION
• distribution? MUSCLE TENDON JUNCTION