Week 6: Somatosensory and Visual Pathways

Question 1

Neuron Type in Dorsal Root Ganglion or Trigeminal Ganglion

Answer 1

Pseudounipolar cells

Question 2

Fine Touch Axon Diameter

Answer 2

Thick

Question 3

Pain and Temperature Axon Diameter

Answer 3

Thin

Question 4

Proprioceptor Types

Answer 4

Muscles spindle organ and golgi tendon organ

Question 5

Muscle Spindle Organ Function

Answer 5

Supports contraction

Question 6

Golgi Tendon Organ Function

Answer 6

Allows for stretching of muscle

Question 7

Proprioceptor Nerve Axon Diameter

Answer 7

Thick and myelinated A alpha fibers

Question 8

Mechanoreceptor Types

Answer 8

Meissner’s Corpuscles, Merkel Cells, Ruffini’s Corpuscles, Pacinian Corpuscles

Question 9

Meissner’s Corpuscles and Merkel Cell Function

Answer 9

Texture and superficial sensation

Question 9

Ruffini’s Corpuscles Function

Answer 9

Deep Pressure

Question 9

Pacinian Corpuscles Function

Answer 9

Vibration

Question 10

Mechanoreceptor Axon Diameter

Answer 10

Medium diameter myelinated A beta fibers

Question 11

Pain and Temperature Receptor Types

Answer 11

Free nerve endings of cold, hot, and pain reception

Question 12

Pain and Temperature Receptor Axon Diameter

Answer 12

Small unmyelinated A delta fibers

Question 13

Cervical tract proximity to gray matter in the spinal cord.

Answer 13

Close to gray matter

Question 14

Gracial Fasciculus Location in Spinal Cord

Answer 14

Just lateral to the dorsal median fissure

Question 15

Cuneate Fasciulus Location in Spinal Cord

Answer 15

Just medial to the dorsal horn

Question 16

Lateral Corticospinal Tract Location in Spinal Cord

Answer 16

Lateral and ventral to the dorsal horn, lateral and dorsal to the ventral horn

Question 17

Spinothalamic Tract Location in Spinal Cord

Answer 17

Lateral and ventral to the ventral horn

Question 18

Ventral Posterior Medial Thalamic Nuclei Function

Answer 18

Sensation related to the face

Question 19

Ventral Posterior Lateral Thalamic Nuclei Function

Answer 19

Sensation related to the body

Question 20

Median Dorsal Thalamic Nuclei Function

Answer 20

Emotional processing of pain

Question 21

Dorsal Column Medial Lemniscus Function

Answer 21

Fine touch, vibration, and concious proprioception to the body

Question 22

Dorsal Column Medial Lemniscus First and Second Neurons

Answer 22

Fasciculus gracilis or cuneatus, nucleus gracilis or cuneatus

Question 23

Dorsal Column Medial Lemniscus Decussation Location

Answer 23

Internal arcuate fibers of medulla

Question 24

Dorsal Column Medial Lemniscus Third Neuron

Answer 24

Ventral posterior lateral nucleus

Question 25

Trigeminal Lemniscus Function

Answer 25

Fine touch and vibration to the face

Question 26

Trigeminal Lemniscus First and Second Neurons

Answer 26

Trigeminal Nerve, main trigeminal sensory nucleus

Question 27

Trigeminal Lemniscus Decussation Location

Answer 27

Pons

Question 28

Trigeminal Lemniscus Third Neuron

Answer 28

Ventral posterior medial nucleus

Question 29

Mesencephalic Trigeminal Nucleus Function

Answer 29

Proprioception and reflexes of the face

Question 30

Anterolateral System Function

Answer 30

Crude touch, pain, and temperature to the body

Question 31

Anterolateral System First and Second Neuron

Answer 31

Dorsolateral fasciculus and 1 to 2 levels of the dorsal horn

Question 32

Anterolateral System Decussation Location

Answer 32

Anterior white commissure of spinal cord

Question 33

Anterolateral System Third Neuron

Answer 33

Ventral Posterior Lateral Nucleus

Question 34

Trigeminothalamic Tract Function

Answer 34

Crude touch, pain, and temperature to the face

Question 35

Trigeminothalamic Tract First and Second Neurons

Answer 35

Spinal trigeminal tract and spinal trigeminal nucleus

Question 36

Trigeminothalamic Tract Third Neuron

Answer 36

Ventral Posterior Medial Nucleus

Question 37

Retinal Layers Deep to Shallow

Answer 37

Pigmented, photoreceptor, outer nuclear, outer plexiform, inner nuclear, inner plexiform, ganglion cell, nerve fiber

Question 38

Rods Function and Location

Answer 38

Low light seeing, concentrated on the periphery of retina

Question 39

Cones Function and Location

Answer 39

Color vision, concentrated in the central retina

Question 40

Axons of Ganglion Cells Collect Here in the Eye

Answer 40

Optic disk

Question 41

Fovea

Answer 41

Central vision with the highest acuity and most input from the optic nerve

Question 42

Fovea Cells

Answer 42

All cones

Question 43

Lateral Geniculate Nucleus Layers

Answer 43

1 and 2 magnocellular, 3 through 6 parvocellular

Question 44

Magnocellular Layer Function

Answer 44

Motion and spatial analysis

Question 45

Parvocellular Layer Function

Answer 45

Color and shape

Question 46

Retinotopic Organization of Primary Visual Cortex

Answer 46

Central vision at the most posterior aspect, then 20, 60, and 90 degrees as we progress anteriorly

Question 47

Posterior Parietal Lobe Function

Answer 47

Visual association area related to spatial awareness, magnocellular pathway

Question 48

Temporal Lobe Function

Answer 48

Visual association area related to object identification, parvocellular pathway

Question 49

Superchiasmatic Nucleus Function

Answer 49

Regulates circadian rhythms based on light input from retina