1anatomy
neocortex
limbic cortex
olfactory cortef
2subcortical structures
amygdala + adjacent cortex (uncus)
hippocampus ( this is cortical actually )
3temporal 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
4**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)
5internal structures
1. lateral (Sylvinan fissure )
2. STS
3. multimodal (polymodal )
6lateral (Sylvian) fissure → forms insula
gustaroy cortex
auditory association cortex
7superioir temportal sulcus (STS)
separates middle and temporal gyri
houses significant amout of neocortex
8multimodal (polymodal)
recives auditory information
visual
somatosensory
9conections
neocortex of both L and R is connected by corpus collostrum
medial temporal lobe and amygdala connected by anterioir commisure
10The 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**
11**Hierarchical system**
function : stimulus recognition
12**Parralel projections ( visual auditory → STS )**
function : stimulus categorazation and indentification ( focused attention is neccery)
13**Projections ( auditory/ visual associative → medial temporal → hipppocampus and amygdala )**
function LTM, spatial memory ( to move) , memory associated to emotions
14**Parallel projections → formtal cortex**
function : movement control, STM (STST involved in focused attention ) , affect
15**Dorsal auditory pathway**
function : acompany movement based on auditory information
16multifunctional temporal lobe :
primary auditory cortex
secondary auditory and visual cortex
limbic cortex
part of primary olfactory cortex
amygdala
hippocampus
17the four basic sensory functions
1. processing auditory input
2. visual object recognition
3. long term storage of sensory input ( memory )
4. processing olfactory input
18*integrative functions*
1. auditory and visual perception
2. memory (LTM for sensory input )
3. emoitonal and motivational functions
19auditory and visual perception
temporal association cortex ( including STS )
perception , identification and categorization
neccesitates detalied and focused perception
20memory (LTM for sensory input )
(medial area + role of hippocampus)
21emoitonal and motivational functions
(mdial area + role of amygdala )
22STS (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
23anatomic 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)
24Neural 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
25leasions in RH temporal lobe
impact on ability to porcess faces than oin LH temporal lobe
26**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
27Fusiform face area
invariant aspects of faces : perception of unique identity
28Inferioir occipital gyri
early perception of facial features
if we see anything goes here
29Superioir temporal sulcus (STS)
chengable aspects of faces
perception of eye gaze
expression
lip movement
30intraparietal sulcus
spatially directed attentuin
31Amygdala, insula,limbic system
emotion
32Anterioir temporal cortex
personal identity : name and biographical information
semantic memory
33Extended system
further processing in concert with other neural systems
34insual corex
orbitofrotal in deep emotions
35damage left temporal :
disturbances in verbal memory
processing of speech sounds
personality disturbances
36damage right temporal
disturbances in nonverbal memory
processing music
ipersonalty disturbances
37primary auditory areas damage
leasion→ increase in treshold (pitch,intensity)
secondary auditory cortex ( superioir anterioir)
38LH
Aphasia of Wernicke
disturbance in discrimination , concerning auditory stimuli
applied simultaneously, temoral ordering of tones
39RH
amusia (volume, timber, pitch)
aprosodia disturbances in localizing sound space
40Wernicke's aphasia
LEFT!!!!!!
41Wernicke'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
42Pure word defness where
disturbance in temporal primary secondary auditory areas
43Pure 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
44speech sounds is normal (RH)
lesion anterioir superioir temporal gyri, in particular left side
disconnection Wernick's area
46Auditory agnosia where
! temoral tertiary auditory areas
47Auditory agnosia symptoms
false identification of non speech sounds
less frequent, in comparison with wor defness
48Auditory 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
49temporal 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
50disturbances
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