Spinal Cord and Brainstem

Question 1

corticospinal tract path

Answer 1

pyramidal cell in cortex → goes through corona radiata (upper motor neuron) → basal ganglia → internal capsule → midbrain → pons → medulla

Question 2

Corticospinal tract purpose

Answer 2

movement information carried from the cortex to the spinal cord and controls the muscles

Question 3

roles of cerebrospinal fluid

Answer 3

Protection
Buoyancy
Nutrition
Waste Removal

Question 4

Spinal Cord segments

Answer 4

Cervical (C1-C8): fingers, neck, shoulders
Thoracic (T1-T12): hands, torso
Lumbar (L1-L5): hips, hamstrings, feet
Sacral (S1-S5): genitals
Coccygeal (Coc1)

Question 5

spinal cord grey/white matter

Answer 5

Cervical: mostly white matter
Thoracic: mostly white matter, little grey matter
lumbar: even grey and white
Sacral: mostly gray matter

Question 6

Ascending Dorsal columns path

Answer 6

Cutaneous receptors in skin –> gracile (lower) and cuneate(upper) fasciculi carry the info up (primary neuron) –> synapse on the gracile and cuneate nuclei in the lower medulla –> decussation in the lower medulla–> medial lemniscus (secondary neuron) travels up spinal cord –> synapses on ventral posterolateral nucleus in thalamus –> tertiary neuron continues and synapses on postcentral gyrus in the cortex

Question 7

Dorsal tract purpose

Answer 7

info about touch and proprioception

Question 8

Spinal Cord Dorsal Horn

Answer 8

Secondary sensory neurons

Question 9

Spinal cord ventral horn

Answer 9

motor neurons

Question 10

cranial nerves

Answer 10

carrying sensory/motor info from face/head to brain

Question 11

divisions of the brainstem

Answer 11

midbrain, pons, medulla, spinal cord