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1
anatomy
neocortex

limbic cortex

olfactory cortef
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subcortical structures
amygdala + adjacent cortex (uncus)

hippocampus ( this is cortical actually )
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temporal lobe includes
contains the following middle , superioir and inferiori temporal gyrus

it is connected to other regions through the brain

separated form upper areas by Sylvian Fissure
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**Important areas**
1. Auditory areas ( BA 41,42, 22 )
2. Ventral visual stream areas / inferior temporal cortex (BA 20, 21, 37, 38 )
3. Olfactory region / pryform cortex (area 27 ( continues to the frontal lobe as well)
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internal structures
1. lateral (Sylvinan fissure )
2. STS
3. multimodal (polymodal )
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lateral (Sylvian) fissure → forms insula
gustaroy cortex

auditory association cortex
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superioir temportal sulcus (STS)
separates middle and temporal gyri

houses significant amout of neocortex
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multimodal (polymodal)
recives auditory information

visual

somatosensory
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conections
neocortex of both L and R is connected by corpus collostrum

medial temporal lobe and amygdala connected by anterioir commisure
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The 5 cortical connection pathways
1. **Hierarchical system**
2. **Parralel projections ( visual auditory → STS )**
3. **Projections ( auditory/ visual associative → medial temporal → hipppocampus and amygdala )**
4. **Parallel projections → formtal cortex**
5. **Dorsal auditory pathway**
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**Hierarchical system**
function : stimulus recognition
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**Parralel projections ( visual auditory → STS )**
function : stimulus categorazation and indentification ( focused attention is neccery)
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**Projections ( auditory/ visual associative → medial temporal → hipppocampus and amygdala )**
function LTM, spatial memory ( to move) , memory associated to emotions
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**Parallel projections → formtal cortex**
function : movement control, STM (STST involved in focused attention ) , affect
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**Dorsal auditory pathway**
function : acompany movement based on auditory information
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multifunctional temporal lobe :
primary auditory cortex

secondary auditory and visual cortex

limbic cortex

part of primary olfactory cortex

amygdala

hippocampus
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the four basic sensory functions
1. processing auditory input
2. visual object recognition
3. long term storage of sensory input ( memory )
4. processing olfactory input
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*integrative functions*
1. auditory and visual perception
2. memory (LTM for sensory input )
3. emoitonal and motivational functions
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auditory and visual perception
temporal association cortex ( including STS )

perception , identification and categorization

neccesitates detalied and focused perception
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memory (LTM for sensory input )
(medial area + role of hippocampus)
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emoitonal and motivational functions
(mdial area + role of amygdala )
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STS (superioir temoral sulcus ) role
detects biological motion (movement of relevance to the spicies )

understanding the intentions of others in an inportant part of social cognition, depends on multimodal integration in the STS

body motion, facial movements, voice cues enable us to recognise perople form safe distance

empathy
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anatomic STS
cells in STS sensitive to mouth movements and vocal characteristics

white matter ( myelin ) important for transmission to frontal lobe

stress can lead to negative development in pathweys (ILF , IFOF)
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Neural pathways for face processing
recognition of pictures is impaired if they are inverted, recognition shows greater impairment, suggesting there is a selctive ability to recognise upright faces

specific cortical regions within the occipital and temporal lobes involved in recognizing upright faces
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leasions in RH temporal lobe
impact on ability to porcess faces than oin LH temporal lobe
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**Distributed system for face perception**
1. fusiform face area
2. interioir occipital gyri
3. STS
4. intraparietal sulcus
5. amygdala insula limbic system
6. extended system
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Fusiform face area
invariant aspects of faces : perception of unique identity
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Inferioir occipital gyri
early perception of facial features

if we see anything goes here
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Superioir temporal sulcus (STS)
chengable aspects of faces

perception of eye gaze

expression

lip movement
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intraparietal sulcus
spatially directed attentuin
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Amygdala, insula,limbic system
emotion
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Anterioir temporal cortex
personal identity : name and biographical information

semantic memory
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Extended system
further processing in concert with other neural systems
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insual corex
orbitofrotal in deep emotions
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damage left temporal :
disturbances in verbal memory

processing of speech sounds

personality disturbances
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damage right temporal
disturbances in nonverbal memory

processing music

ipersonalty disturbances
37
primary auditory areas damage
leasion→ increase in treshold (pitch,intensity)

secondary auditory cortex ( superioir anterioir)
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LH
Aphasia of Wernicke

disturbance in discrimination , concerning auditory stimuli

applied simultaneously, temoral ordering of tones
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RH
amusia (volume, timber, pitch)

aprosodia disturbances in localizing sound space
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Wernicke's aphasia
LEFT!!!!!!
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Wernicke's aphasia symptoms
speech sounds get intermingled

disturband recognition of words → comprehension

not being able to regulate speech

has a large effect on speech, reading, writing and repetition

word salad

fluent speech but words are not real

good grammar no menaing
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Pure word defness where
disturbance in temporal primary secondary auditory areas
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Pure word defness symptoms
decline in recognition speech sounds

cannot understand a spoken word but is able to read, written and speak normal

comprehansion of non
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speech sounds is normal (RH)
lesion anterioir superioir temporal gyri, in particular left side

disconnection Wernick's area
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auditory input
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Auditory agnosia where
! temoral tertiary auditory areas
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Auditory agnosia symptoms
false identification of non speech sounds

less frequent, in comparison with wor defness
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Auditory agnosia LH vs RH
RH perceptual discriminative : accoustic failure, confusing the osund of a train with sound of drill

can hear a motor sound but do not know which

no hearing problem

LH : associative semantic : the menaing of the sound of running water
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temporal tertiary areas
organizing material that is important for language and memory

better understanding of long sentences and a lot of text

categorizing pictures aor words, resulting in a better memory

sematic categories have a hierarchical structure

duck : animal →bird→ waterbird

leasion LH temporal lobe : one is able to recognize a broad category but problems in recognizing specific ones
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disturbances
problems in interpreting and using information in the correct context

same information may differ depending on the context " fall is a season or a tumbling

contex may be important for face recognition

temporal right side
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