Spinal Cord Anatomy/Receptors

Question 1

Afferent vs Efferent transmission

Answer 1

Afferent: Sensory from spinal cord to brain.

Efferent: Motor from Brain to spinal cord

Question 2

Spinal cord arteries

Answer 2

1 anterior spinal artery

2 posterior spinal arteries

Question 3

Gray matter regions of the spinal cord

Answer 3

(1) Anterior horn
(2) Intermediate gray
(3) Posterior horn

Question 4

Nucleus (in neuroscience)

Answer 4

A group of neurons with a common function or modality (ex. hypoglossal nucleus– motor to the tongue [GSE])

Question 5

Nucleus proprius

Answer 5

Proper sensory nucleus

Receives many sensory inputs

Question 6

Muscle spindles detect…

Answer 6

Muscle length

Question 7

Golgi tendon organs detect…

Answer 7

Muscle tension

Question 8

Functioning of GSA

Answer 8

Pain, temperature, touch, etc. from skin and body wall

Question 9

Functioning of GVA

Answer 9

Pain, stretch to viscera

Question 10

Functioning of GVE

Answer 10

Motor to viscera, glands and blood vessels (autonomic nervous system)

Question 11

Functioning of GSE

Answer 11

Motor to skeletal muscles

Question 12

Functioning of SSA

Answer 12

Special senses of vision, hearing, and balance

Question 13

Functioning of SVA

Answer 13

Taste and smell

Question 14

Functioning of SVE

Answer 14

Innervates muscles of gill origin (pharynx, larynx, mastication and expression CN V, VII, IV, X, and XI)

Question 15

Dorsal Root Afferent Lateral Division

Answer 15

Thin lightly myelinated fibers

Pain and temp, light touch, visceral afferents

Question 16

Dorsal Root Afferent Medial Division

Answer 16

Thick, heavily myelinated

2 point touch, limb position, muscle stretch

Sends collaterals to medulla

Question 17

Free Nerve Endings

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 17

• Nonencapslated
• Slow adapting
• Pain/Temp
• Deep skin/visera

Question 18

Merkel’s Disk

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 18

• Nonencapsulated
• Slow adapting
• Touch
• Feet, hand, genitalia, lips

Question 19

Hair Follicle

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 19

• Nonencapsulated
• Fast adapting
• Touch
• Anywhere there is hair

Question 20

Meissner’s Corpuscle

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 20

• Encapsulated
• Fast adapting
• 2 point discrimination
• Hairless skin, fingertips, joints, ligaments

Question 21

Pacinian Corpuscle

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 21

• Encapsulated
• Fast adapting
• Vibration
• Fingers, toes, palms, mesenteries, peritoneum

Question 22

Ruffini Ending

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 22

• Encapsulated
• Slow adapting
• Stretch/ pressure
• Dermis

Question 23

Joint Receptor

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 23

• Encapsulated
• Slow adapting
• Joint position
• Joint capsules; ligaments

Question 24

Neuromuscular spindle

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 24

• Encapsulated
• Slow adapting
• Limb muscle, stretch/length
• Muscles

Question 25

Golgi Tendon Organs

Encapsulated vs nonencapsulated; Fast vs Slow adapting; Function; Distribution

Answer 25

• Encapsulated
• Slow adapting
• Muscle tension
• Muscle tendon junction