Temporal Lobe Flashcards
the temporal lobe is ______ to the occipital lobe
anterior
the temporal lobe is the tissue below the
lateral/sylvian fissure
subcortical temporal lobe circuit limbic cortex connections?
amygdala
hippocamous
congulate cortex
subdivisions of the temporal cortex (5)
lateral surface insula multimodal cortex medial temporal cortex TH and TF
lateral surface
- auditory areas
- visual areas
Insula
- Inferior to sylvian fissure
- Gustatory cortex
- Auditory association cortex
- Area under sylvian fissure
- Gustatory cortex
- Auditory association
Multimodal cortex
- superior temporal cortex
input from auditory, visual and somatic regions
medial temporal cortex
- amygdala and adjacent cortex
- hippocampus and surrounding cortex
- fusiform gyrus
TH and TF
parahippocampal
Auditory cortex
- Lateral fissure
- Parts of Heschl’s gyrus and superior temporal gyrus
- Includes planum temporal
- Roughly Brodmann areas 41, 42, and partially 22
connections of the temporal cortex
- Afferent projections from sensory systems
- efferent projections to parietal and frontal association regions (limbic system and basal ganglia)
left and right hemisphere connected by
corpus callosum
anterior commissure
hierarchal sensory pathway
incoming auditory and visual information
stimulus recognition
dorsal auditory pathway
auditory cortex
detection of spatial location /movement
polymodal pathway
from auditory and visual areas to the polymodal cortex (STS)
stimulus categorization
medial temporal projection
from auditory and visual areas to the medial temporal lobe, limbic cortex, hippocampal formation, and amygdala
performant pathway
memory
frontal lobe projection
auditory and visual cortex to frontal lobe
movement control
memory
affect
where has launched a brain imaging factory
china
50 automated imaging machines
the hippocampus
- temporal lobe
- memory and navigation
- Alzheimer’s disease and other forms of dementia occur partly due to damage in this area of the brain, resulting in early symptoms including short term memory loss and disorientation
- damage may result in inability to form and retain new memories
- It also closely is related to other diseases such as epilepsy, schizophrenia, transient global amnesia and PTSD
- However, the role of the hippocampus in complex brain networks, particularly its influence on brain-wide functional connectivity, is not well understood by scientists
- Functional connectivity refers to the functional integration between spatially separated brain regions
University of Hong Kong Breakthrough Study
highlight the role of low frequency activity propagating along the hippocampal-cortical pathway, particularly its contribution to brain-wide functional connectivity and enhancement of sensory functions
Is Alzheimers reversible?
no
is Alzheimers a normal part of aging
no
what is typical first symptom of Alzheimers
decline in non-memory aspects of cognition, such as visual/spatial issues, and impaired reasoning or judgment
Mild Alzheimers
- greater memory loss ad it progresses
- often diagnosis happens at this stage
- problems include: wandering and getting lost, trouble handling money and paying bills, repeating questions, taking longer to complete normal daily tasks, personality and behavior changes
Moderate Alzheimers
- begin to have problems recognizing family and friends
- may be unable to learn new things, complete multiple step tasks (getting dressed), or cope with new situations
- hallucinations, delusions, paranoia and may be impulsive