ANTR 350 1st Edition Lecture 12Outline of Last Lecture I. Functions of CNSII. CSFIII. Clinical correlatesIV. Cerebrum V. Diencephalon VI. Cerebellum Outline of Current Lecture II. Gross anatomy of spinal cordIII. Gray matterIV. White matterV. Numbering of spinal nervesVI. Anterior ramiCurrent Lecture-spinal cord begins at the level of the foramen magnum of the skull; is continuous with the medulla oblongata-ends at the level of the L1 or L2 vertebra because the vertebral column of adults is longer than spinal cord; vertebral column grows for a longer period of time-conus medullaris: tapered, terminal portion of the spinal cord-cauda equina: resembles a horse’s tail, extends inferiorly from the conus medullaris and is comprised of the anterior (ventral) and posterior (dorsal) roots from inferior spinal cord segments-gray matter: butterfly shaped-posterior: GSA and GVA axons terminate-anterior: cell bodies of GSEs (skeletal muscles)-lateral: cell bodies of GVEs from T1-L2 level-central canal is continuous with the 4th ventricle and contains CSFThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-white matter-ascending: collection of interneurons that convey sensory info to thalamus relay stations-descending: collection of interneurons that convey motor info-numbering of spinal nerves-cervical: 8-thoracic: 12-lumbar: 5-sacral: 5-coccygeal: 1-anterior rami form somatic neural plexuses-cervical: distribution to neck, shoulder, and posterior head-brachial: distribution to upper limb-lumbar: distribution to lower trunk, anterior, and medial thigh-sacral: distribution to lower
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