BIO 365R Lecture 20 somatosensory

BIO 365R Lecture 20 somatosensory - Some mechanosensory...

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Some mechanosensory neurons respond to an increment in pressure by giving a brief response (rapidly adapting), others adapt slowly
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Anatomy of muscle stretch receptor (also called muscle spindle).
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Reflex and Cerebellar Channels
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medulla Somatosensory Lemniscal Channel Somatosensory cortex spinal cord hand region foot region . Cortex . Dorsal root ganglia pons cerebellum midbrain hypothalamus thalamus Pituitary gland Olfactory bulb Lemniscus: Latin for ribbon. Lemniscal pathways are long and ribbon-like.
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Dermatomes: the region of skin innervated by each spinal nerve Trigeminal nerve is one of the 12 cranial nerves.
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Lemniscal pathway: crosses in medulla Dorsal root ganglion
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* Pain and temperature information run in a different pathway.
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The spinothalamic pathway crosses in the spinal cord, the leminscal pathways does not To brain Lemniscal To brain Spino-thalamic
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The spinothalamic pathway crosses in the spinal cord, the leminscal pathways does not To brain Lemniscal To brain Spino-thalamic
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Dissociated sensory loss following spinal hemisection
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Spinal cord thalamus Somatosensory cortex medulla Dorsal root ganglion
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Two point discrimination threshold
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This note was uploaded on 04/12/2009 for the course BIO 51340 taught by Professor Zakon during the Spring '09 term at University of Texas at Austin.

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BIO 365R Lecture 20 somatosensory - Some mechanosensory...

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