Sensorimotor System Continued

Question 1

the …. delivers touch info

Answer 1

dorsal column system

Question 2

receptors send axons via the dorsal spinal cord to synapse on neurons in the …

Answer 2

brainstem

Question 3

axons from those neurons cross the midline in the medulla and go to the …

Answer 3

thalamus

Question 4

from there, the info goes to the ….

Answer 4

primary somatosensory cortex

Question 5

…of the finger leads to reflexive withdrawal of the hand, mediated by the spinal circuits before we even feel the pain

• at the brainstem, other circuits turn our head towards the source of pain

Answer 5

painful stimulation

Question 6

one exists for each modality (e.g., primary somatosensory cortex, primary visual cortex); this is the initial destination of sensory input to cortex

Answer 6

primary sensory cortex

• located in the post central gyrus; receives touch info from the opposite side of body

Question 7

or secondary sensory cortex, receive and process the same info, in collaboration with the primary sensory cortex

Answer 7

non primary sensory cortex

Question 8

S1 cells are arranged as a map of the body –

Answer 8

a sensory homunculus

Question 9

a condition in which a stimulus in one modality creates a sensation in another

Answer 9

synesthesia

• example: a person may perceive colors when looking at letters, or taste when hearing a tone