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What brain vesicle is the thalamus in?
diencephalon
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Function of Thalamus
- 1. relay station for information from sensory receptors (except olfactory) to cerebral cortex
- 2. conscious awareness of specific sensory stimuli (specific/less specific touch, pressure, pain, temp, vibration)
- 3. role in motor pathways (through connections with corpus striatum, cortical areas 4-6-8 and cerebellum
- 4. regular cortical activity through reticular activating system
- 5. feelings and emotions
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thalamus is covered on the lateral outer surface by
external medullary lamina
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external medullary lamina
myelinated fibers that cover the thalamus
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reticular thalamic nuclei
separate the thalamus from the internal capsule
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3 nuclear masses of gray matter thalamus broken down into
- anterior nuclear mass
- medial nuclear mass
- lateral nuclear mass
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thalamic gray matter nuclear masses broken down by
internal medullar lamina
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what is the anterior nuclear mass comprised of ?
anterior group nuclei
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what is the medial nuclear mass comprised of?
Medial group nuclei
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What is the lateral nuclear mass comprised of?
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What is the ventral tier of the lateral mass comprised of the ventral group nuclei which is broken down into
- Medial geniculate bodies (MGB)
- Lateral geniculate bodies (LGB)
- Ventral anterior nuclei (VA)
- Ventral posterior nucleus (VP)
- Ventral lateral nucleus (VL)
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The dorsal tier of the lateral mass is comprised of?
- Lateral group nuclei
- Posterior group nuclei
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The lateral group of the dorsal tier consists of?
- lateral thalamic nuclei
- pulvinar nuclei
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The posterior group
- Suprageniculate nuclei
- Nucleus limitans
- Superior aspect of MGB
- Adjacent pulvinar nuclei
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