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10 Cards in this Set
- Front
- Back
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Composed of the brain and spinal cord
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Central nervous system
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* Cephalization
* Elaboration of the anterior portion of the ____ * Increase in number of nerurons in the head * highest level is reached in the human brain |
Central Nervous System
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* Composed of wrinkled, pinkish gray tissue
* Surface anatomy includes cerebral hemispheres, cerebellum, and brain stem |
The Brain
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Embryonic development happens in the first ___ days
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26
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* ectoderm thickens forming the neural plate
* The neural plate invaginates, forming the neural groove * The neural groove fuses dorsally and forms the neural tube. * This ultimately becomes the nervous system |
Embryonic Development
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BASIC PATTERN OF THE CENTRAL NERVOUS SYSTEM
* central cavity surrounded by a gray matter core * External to which is white matter composed of myelinated fiber tracts |
Spinal Cord
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BASIC PATTERN OF THE CENTRAL NERVOUS SYSTEM
* similar to spinal cord but with additional areas of gray matter * Cerebellum has gray matter in nuclei * Cerebrum has nuclei and additional gray matter in the cortex |
Brain
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* Form the superior part of the brain and make up 83% of its mass
* Contain ridges (gyri) and shallow grooves (sulci) * Contain deep grooves called fissures * Are separated by the longitudinal fissure * Have three basic regions: cortex, white matter, and basal nuclei |
Cerebral Hemispheres
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____ sulci divide the hemispheres into five lobes: Frontal, parietal, temporal, occipital, and insula
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Deep sulci
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____ sulcus- separates the frontal and parietal lobes
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Central
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