week 6 Flashcards
(35 cards)
What is cognition
The bridge and guide between sensory input and behavioral output OF YOUR BUTTHOLE
- Knowing, its internal life
- percption
- attention
- memory
- language
- emotion
- planning
- consciousness
What makes up Default network
- Posterior parietal
- Posterior cingulate/precuneus
- Dorsolateral prefontral
- Medial prefrontal
- Medial temporal
- rostrolateral temporal
- its basically whats active when you are not doing anything
- areas of association cortex
Default network involved with
daydreaming Autobiographical memories envisioning of future moral decisions - it contrasts with task positive network
Association cortex
Not-primary cortices
- can be unimodal and multimodal (integrates info across sensory modalities from other sources)
1. Premotor cortex
2. somatosensory association cortex
3. visual association cortex
4. auditory association cortex
Pyramidal cell layers
1,2,3,5
Stellate cell layer
4
Primary sensory cortex inputs
- Sense-specific thalamic nucleus
- MGN, LGN, VPM, VPL layer 4 - Other cortical areas 1,2,3,5
- multimodal inputs from thalamus layer 1
- Modulatory inputs from brainstem via 5HT, NE, DA, and Ach via all layers
Medial geniculate nucleus
auditory
- cochlea (via brainstem auditory nuclei) in
- primary auditory cortex out
Lateral geniculate nucleus
vision
- retina in
- primary visual cortex out
Ventral posterior medial
Facial sensory
Ventral posterior lateral
sensory to the rest of body
- Skin (via medial lemniscus) in
- Primary somatosensory cortex out
Multimodoal thalamic nuclei
Pulvinar
- Ass. Cortex, SC in
- Parietotemporal and visual ass cortex out
Medial dorsal
- Sc, Olfactory cortex, amygdala, ventral pallidum in
- FEM, anterior cingulate cortex out
Lateral posterior
- Ass cortex and anterior cingulate retina in
- Parietal, visual ass. cortex, ant cingulate out
Anterior
- hypothalamus, hippo, cingulate in
- posterior cingulate out
Association cortex inputs
- multimodal thalamic layer 4
- Other cortical area 1,2,3,5
- multimodal inputs from thalamus layer 1
- Modulatory inputs from brainstem via 5HT, NE, DA, and Ach via all layers
Sensory and association cortex outputs
- Other cortical areas layers 2 and 3
- Thalamus vai 6
- Thalamus and other subcortical areas like BG, midbrain, BS, Spinal cord via 5
Layer 3
Corticocortical
- or callasal connections
Layer 4
inputs from thalamus
Layer 5
descending projections
Association cortex function
- integrate input from different modalities
- mediate internal cognition
- mediate between sensory inputs and the appropriate behavioral output
Parietal cortex
- visual attn and other attention (non-dominant hemisphere)
- localization– searching (wheres waldo) and reaching for objects found in (superior posterior parietal cortex)
- spatial relationships- binding input from scene to make a single image
- motor programs (skill movements and R-L orientation) via dominant hemisphere
Temporal cortex
- recognition and object identification
2. language
Prefrontal cortex
- Planning and decision making “executive function”
2. working memory
Inferior posterior parietal cortex
non-dominant hemi
- attention
- lesion gives you spatial neglect or one sided neglect (1/2 of all right sided strokes) because the left visual comes strictly from right but right visual field comes from both why you dont see these symptoms on a left sided stroke
- you can see letter but ignore attention to left visual field
- Can’t draw the left half of the clock
Motor Apraxia
Loss of ability to perform skilled motions
sensory and motor systems are intact– you can move fine
- similar symptoms one would see to premotor cortex which responds to external stimuli
Spatial neglect
- lesion gives you spatial neglect or one sided neglect (1/2 of all right sided strokes) because the left visual comes strictly from right but right visual field comes from both why you dont see these symptoms on a left sided stroke
- you can see letter but ignore attention to left visual field
- Can’t draw the left half of the clock
