PSYC 125 Week 4: Sensorimotor Functioning

0.0(0)
Studied by 4 people
call kaiCall Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/53

Last updated 11:15 PM on 3/12/23
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai

No analytics yet

Send a link to your students to track their progress

54 Terms

1
New cards
precentral gyrus
primary motor cortex

* anterior of central sulcus
* located in frontal lobe
2
New cards
postcentral gyrus
primary sensory cortex

* posterior to central sulcus
* located in parietal lobe
3
New cards
somatosensory processing
* external
* internal
* receptors
4
New cards
external processing
* touch
* pain
* heat
5
New cards
internal processing
* body position
* fever
6
New cards
receptor types
* mechanical
* chemical
* thermo
* nocioceptors
* proprioceptors
7
New cards
mechanical
physically moved
8
New cards
chemical
respond to chemicals
9
New cards
thermoreceptors
respond to temperature
10
New cards
nocioceptors
pain
11
New cards
proprioceptors
body position
12
New cards
gustatory (taste) system
info sent from tongue → thalamus → multiple brain regions
13
New cards
ageusia
absence of taste
14
New cards
dysgeusia
reduced taste; bland
15
New cards
phantogeusia
tasting things that aren’t there
16
New cards
olfaction system
* info sent from olfactory bulb → limbic system → frontal cortex
17
New cards
anosmia
absence of smell
18
New cards
dysosmia
impaired smell
19
New cards
phantosmia
* smell something that is not there


* common in epilepsy
* bad smells
20
New cards
what do smell receptors go through?
penetrate through bone
21
New cards
what happens to smell after head injury?
sense of smell damaged
22
New cards
what is needed for chemical senses to breakdown molecules for brain processing?
moisture
23
New cards
homunculus
* how space is represented in brain
24
New cards
which body parts have the most real estate?
* mouth/lips
* hands
25
New cards
info sent from body to
* thalamus
* contralateral primary somatosensory cortex
26
New cards
astereognosis
inability to identify object by touch
27
New cards
finger agnosia
inability to identify fingers
28
New cards
paresthesia
numbness (diabetes)
29
New cards
phantom limb pain
feel pain in limb you lost
30
New cards
proprioceptive disorder
not knowing where you are in space

* falling over, not realizing arm is up
31
New cards
tactile extinction
patients can respond to left/right separately but not tgth bc they cancel out
32
New cards
motor system
info sent to body
33
New cards
where is the info (in motor system) sent to
* internal capsule (then decusates) → spinal cord → muscles via contralateral projections
34
New cards
supplementary motor area
* motor sequencing, timing, initiation
* INTERNAL cues
35
New cards
premotor area
* motor sequencing, timing, initiation
* EXTERNAL cues
36
New cards
cingulate motor area
spontaneous movement
37
New cards
apraxia
absence of movement
38
New cards
limb-kinectic
fine motor coordination (clumsy)
39
New cards
ideomotor
* can’t move on demand/lots of pantomime
* idea of movement is impaired
* can do motor behavior spontaneously (limbs work)
40
New cards
conceptual
lost knowledge of behavior (mistaken usage)
41
New cards
ideational/dissociation
sequencing of motor program

* can’t rub belly and tap head at once
42
New cards
auditory system
* bilateral rep
* info sent from cochlea → thalamus → primary auditory cortex
* ipsilateral & contralateral inputs to cortex from each ear
43
New cards
visual system
info sent from retina → thalamus (LGN) → V1
44
New cards
visual pathway
* left visual field → right side of retina in BOTH eyes → right hemi
* right visual field → left side of retina in BOTH eyes → left hemi
45
New cards
optic nerve
leaves eye to carry info to brain
46
New cards
optic chiasm
crossover point
47
New cards
post-optic chiasm, what does optic nerve become?
optic tract
48
New cards
where does optic tract synapse at?
LGN
49
New cards
optic radiation
spreads out → V1
50
New cards
visual field deficits (hemianopias)
half of visual field is impaired
51
New cards
visual agnosia
can’t recognize objects/faces
52
New cards
achromotopsia
colorblind
53
New cards
disconnection syndrome
* heteromodal


* senses not combining properly
* breakdown of integration
54
New cards
higher order visuospatial deficits
inability to see objects from different perspective