Lecture 35: Major Neuroanatomical Pathways II

Question 1

cell bodies of pseudounipolar neurons are contained within

Answer 1

dorsal root ganglia

Question 2

what’s special about axons of pseudounipolar neurons

Answer 2

have local and ascending branches

Question 3

4 main peripheral receptor types throughout somatic tissues

Answer 3

touch
proprioception
thermal senses
pain

Question 4

what kind of neurons do peripheral receptors signal change to CNS through

Answer 4

pseudounipolar

Question 5

2 pathways info from skin can go once reaching DSG

Answer 5

contribute to local circuits
travel to brainstem or thalamus –> cortex

Question 6

central pathways definition

Answer 6

axon tracts to and from brain that carry motor commands or sensory info

Question 7

sensory tracts definition

Answer 7

carry info on stimuli by ascending the spinal cord to brainstem and cortex

Question 8

motor tracts definition

Answer 8

leave cortex and descend spinal cord carrying motor commands

Question 9

3 components of local circuit

Answer 9

sensory neuron –> interneuron –> motor neuron

Question 10

2 somatosensory pathways/systems

Answer 10

dorsal column-medial lemniscal system
anterolateral system/spinothalamic tract

Question 11

dorsal column-medial lemniscal system: type of info, path of axons

Answer 11

tactile/touch + conscious proprioception
axons traveling toward thalamus cross to other side in medulla

Question 12

anterolateral system/spinothalamic tract: type of info, path of axons

Answer 12

pain, itch, temperature, non conscious proprioception
axons cross to other side of spinal cord at the level of entry –> change direction and ascend toward thalamus