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Somatosensory Cortex
Somatosensation
| Question | Answer |
|---|---|
| Cells of the VPN, PFN, and ILN of the thalamus project to _________ cortex. | somatosensory cortex |
| What are the two somatosensory cortex? | -Primary somatosensory cortex (S1) -Secondary somatosensory cortex (S2) |
| Somatosensory information eventually goes to the ___________ cortex in _______ ________ lobe and ________ lobe. | -association -posterior parietal -prefrontal |
| Primary somatosensory cortex (S1) Where does it most of its projections? | From thalamus |
| Primary somatosensory cortex (S1) Mostly carries info about ________ side of the body. | contralateral |
| Primary somatosensory cortex (S1) Has ___ layers organized in columns; layer 4 is the ____ layer. | -6 -input |
| Primary somatosensory cortex (S1) Cells within a column respond to the (same/different) body location and to the (same/different) type of stimulation. | -same body location -same type of stimulation (e.g. touch, pressure, temperature) |
| Primary somatosensory cortex (S1) Somatosensory cortex is organized according to a _____ of the ______ ________. What is this referred to as? | -map of the body surface -Somatotopic organization |
| Primary somatosensory cortex (S1) The somatotopic map is referre dto as the ________ ________. | Somatosensory homonculus |
| Primary somatosensory cortex (S1) Some body regions have greater representation in the cortex. This is known as: | Cortical magnification |
| Primary somatosensory cortex (S1) Greater cortical representation means: | Greater sensitivity to that body region |
| Primary somatosensory cortex (S1) Somatosensory cortex cells have _________ fields with _______ and _______ regions. | -receptive -excitatory and inhibitory |
| Primary somatosensory cortex (S1) Outputs from S1 go where? | They go to S2 and to association cortex in posterior parietal lobe. |
| Secondary somatosensory cortex (S2) Gets most of its inputs from ___. | S1 |
| Secondary somatosensory cortex (S2) Has __________ organization | somatotopic |
| Secondary somatosensory cortex (S2) Gets inputs from (one/both) sides of the body. | Both |
| Secondary somatosensory cortex (S2) Also projects to ________ cortex in _________ _________ lobe | -association cortex -posterior parietal |
| Association cortex Is located in _____ ______ lobe. | posterior parietal |
| Association cortex Much of the outputs from where go to this location? | S1 and S2 |
| Association cortex Some cells here are ________ neurons...they respond to what kind of information? | -bimodal -they respond to somatosensory and visual information |
| Association cortex Some cells here project to ______ cortex in the _________ lobe. | -association -prefrontal lobe (dorsolateral prefrontal) |
| Association cortex These association cortex areas are involved in doing what to sensory info? | They integrate sensory information from multiple sensory modalities and using that, you plan for movements. |
| All somatosensory inputs help do what? | Guide your movements |
| Association cortex is responsible for what? | Knowing where you intend to go |
| Asteroagnosia is what? This is the result of what? | -The inability to recognize objects by touch -Sometimes results after damage to the parietal lobe |
| Asomatognosia is what? This is the result of what? | -The inability to recognize parts of one's own body -Is usually unilateral (usually the deficit is for body parts on the left -Often due to damage in the posterior parietal lobe (on the right) |
Created by:
kibarra87