Parietal and Temporal Lobes Flashcards
polymodal PG (parietal area) responds to what inputs
somatosensory and visual inputs
what parietal area is much bigger in humans
polymodal PG and STS
both STS and PG are larger in
right hemisphere
the third visual pathway and that responds to various combos of auditory, visual and somatosensory inputs
superior temporal salcus (STS)
visual processing areas in parietal cortex (dorsal stream)
intraparietal salcus and parietal reach region
intraparietal salcus helps control?
saccadic eye movements
involuntary, abrupt, and rapid small movements made by the eyes when changing the fixation point
saccade
PE, PF, and PG are all …
connections of the parietal cortex
Area PE receives inputs from ? and outputs to?
- primary somatosensory cortex
- primary and secondary motor outputs and PF
guiding movement by providing info about limb position is due to what parietal area
area PE (area PE is somatosensory)
area PF receives info from ? through (3) ?
primary somatosensory cortex through PE, primary cortex and premotor cortex and small visual input through PG
specifying movement goals and understanding visually what is going on and integrating in motor systems and visual awareness is due to what parietal area
area PF
what area receives more complex connections
area PG
what connections does area PG recieve (6)
-Visual, auditory (understand where things are visually and auditorily)
– Somesthetic (skin sensation
– Proprioceptive (position of self/movement) – Vestibular (balance)
– Oculomotor (eye movement) (important for understanding where things are in space)
– Cingulate (motivation)
parieto-temporal-occipital crossroads describes what parietal area
area PG
3 dorsal pathways that leave the posterior parietal region
parieto-premotor (the how pathway)
parieto-prefrontal (visuospatial functions)
parieto-medial temporal (spatial navigation)
the parieto-medial temporal pathway goes to ?
hippocampus and parahippocamp regions
how does the posterior parietal cortex contribute to the dorsal stream
by participating in non conscious visuospatial behaviors (ex grasping and reaching)
anterior zones of parietal lobe does?
processes somatic sensations and perceptions
posterior zone of parietal lobe does?
- plays a big role in ?
integrates info from vision with somatosensory info for movement and spatial function
- mental imagery
- object rotation and navigation through space
lesions of post central gyrus of parietal lobes leads to (4)
- higher sensory threshold
- impaired position sense
- deficits in stereognosis, or tactile perception
- afferent paresis (clumsy finger movements due to lack of kinesthetic feedback about finger position)
Inability to recognize nature of an object by touch
Astereognosis: disorder of tactile perception
A failure to report a stimulus on one side
–> associated with damage to?
simultaneous extinction
-areas PE and PF
Cannot feel stimuli and cannot feel touch, but can report the location of the touch (you could burn them and they wouldn’t feel it, but they could tell you where they got burned
- can be caused by lesions to
numb touch (blind touch) PE and PF and some of PG
Loss of sense of one’s own body; most commonly affects left side of body. (because lesion predominately in the right side)
Asomatognosia
Unawareness or denial of illness
anosognosia
indifference to illness
anosodiaphoria
Absence of normal reactions to pain such as withdrawal
asymbolia for pain
inability to localize/ name body parts
autopagnosia
patients begin to respond to stimuli on the neglected side as if stimuli were on unlesioned side of the body or space
Allesthesia
during recovery of contralateral neglect, patients go through?
allesthesia and then simultaneous extinction
contralateral neglect is generally caused by damage to? and more specifically ? and ?
right inferior parietal lobe, right intraparietal salcus, right angular gyrus
inability to write, see or read words on one side
neglect paralexia
ignoring one half of the page while typing is a sign of
neglect paragraphia
not shaving half your face is a sign of
personal neglect
is a movement disorder, where loss of skilled movement is not attributable to muscles problems, poor comprehension, or other movement disorders (e.g., tremor
apraxia
apraxia is caused by disruptions in ?
parietofrontal connections
2 types of apraxia
Ideomotor – Unable to copy movement or make gestures (e.g., hand-waving) • Constructional – Spatial organization is disturbed (e.g., cannot assemble puzzles, draw a picture)
visual and auditory info of the temporal lobe converges at the ?
superior temporal salcus
the medial temporal projection of the temporal lobe runs from the ? to the ?
auditory and visual association areas to the hippocampus, amygdala or both
what connection of the temporal lobe is crucial for long term memory
medial temporal projection
what connection of the temporal lobe is for movement control, short term memory and affect
frontal lobe projection
cross modal matching occurs where
superior temporal salcus
what functions to provide an affective response *function of temporal lobe)
amygdala
what plays a role in spatial navigation? (function of the temporal lobe)
hippocampus
what brain part plays a role in social cognition (function of temporal lobe)
and what does it do
superior temporal salcus
- analyzes biological motion
- movements with species specific social meaning
Theory of mind that allows us to develop hypotheses about other people’s intention
social cognition
Verbal Memory Deficits and Deficits processing speech sounds would come from damage to?
left temporal lobe
affected Nonverbal memory (e.g., faces) and Deficits processing music would come from damage to ?
right temporal lobe
