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May 18, 2021 · Explain the arrangement of gray and white matter in the spinal cord. Compare and contrast how white and gray matter process information. Describe the sensory and motor components of spinal nerves and the plexuses that they pass through. Explain what a dermatome is and its clinical significance.
Oct 30, 2023 · The gray matter can be functionally divided into three main regions: The anterior horn is responsible for motor function; The lateral (intermediate) horn is only present in the thoracic region and predominantly responsible for autonomic functions ;
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- 27 min
- Lamina I
- Lamina II
- Lamina III
- Lamina IV
- Lamina V
- Lamina Vi
- Lamina VII
- Lamina VIII
- Lamina IX
- Lamina X
tip of the dorsal horncells respond to noxious or thermal stimulisends information to the brain by the contralateral spinothalamic tractcorresponds to the marginal zoneInvolved in sensation of noxious and non-noxious stimuli, and modulating sensory input to contribute to the brain’s interpretation of incoming signals as painful, or not.Sends information to Lamina III and IVCorresponds to substantia gelatinosaInvolved in proprioception and sensation of light touch.Cells in this layer connects with cells in layers IV, V and VI.Partially corresponds to nucleus propriusInvolved in non-noxious sensory information relay and processing.Cells connect with those in lamina IIPartially corresponds to nucleus propriusRelays sensory, including nociceptive (potentially painful), information to the brain via the contralateral and spinothalamic tractsReceives descending information from the brain via the corticospinal and rubrospinal tracts.Contains many small interneurons involved in spinal reflexesReceives sensory information from muscle spindles (involved in proprioception).Sends information to the brain via ipsilateral spinocerebellar pathwaysLarge, heterogenous zone that varies through the length of the spinal cord.Receives information from Lamina II to VI, and from visceraRelays motor information to the visceraGives rise to cells involved in the autonomic systemVaries depending on spinal cord level, but is most prominent in cervical and lumbar enlargementsCells are involved in modulating motor output to skeletal muscleSize and shape varies between spinal cord levelsDistinct groups of motor neurons that innervate skeletal muscle.Surrounds the central canal – the grey commissureAxons decussate (cross over) from one side of the spinal cord to the other- (83)
The grey color comes from the cell bodies and the absence of myelin.In the brain, gray matter forms the outer cortical layer of the cerebrum and cerebellum (i.e. the cerebral and cerebellar cortices).
Jul 27, 2018 · Structure of gray matter. Gray matter is found throughout the brain, the brainstem, the cerebellum, and the spinal cord. In the brain, it’s found at the cerebral cortex (the surface of the two cerebral hemispheres, between the left and right).
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Grey matter, or brain matter in American English, is a major component of the central nervous system, consisting of neuronal cell bodies, neuropil ( dendrites and unmyelinated axons ), glial cells ( astrocytes and oligodendrocytes ), synapses, and capillaries. Grey matter is distinguished from white matter in that it contains numerous cell ...
Mar 16, 2021 · Christopher Bergland. The Athlete's Way. Why Gray Matter Volume in All Four Brain Hemispheres Matters. Gray matter loss in the right cerebellar hemisphere may be tied to Alzheimer's....
