Identify the most accurate statement regarding the longitudinal organization of the spinal cord. On one side of the midline, the dorsal column comprises two subdivisions in the lumbosacral enlargement. There is more neural circuitry in the gray matter of the thoracic segments than in the cervical or lumbosacral enlargements of the spinal cord. The greatest cross-sectional area along the length of the spinal cord is achieved in the cervical enlargement. In the cervical segments of the spinal cord, the volume of gray matter is greater than the volume of white matter. The lateral horns are a characteristic feature of the cervical spinal cord. Identify the spinal cord segment shown below. cervical-medullary junction conus medullaris thoracic cervical lumbar Identify the level of the brainstem shown below. rostral pons caudal medulla rostral medulla middle of pons caudal midbrain
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The task is to identify the most accurate statement regarding the longitudinal organization of the spinal cord from a set of given statements. This requires knowledge of the anatomy of the spinal cord, including its divisions and characteristics. Show more…
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Anatomy of the Spinal Cord 1. Complete the following statements by inserting the proper anatomical terms in the answer blanks. The superior boundary of the spinal cord is at the level of the foramen magnum of the skull, and its inferior boundary is at the level of vertebra . The collection of spinal nerves traveling in the vertebral canal below the terminus of the spinal cord is called the 2. Using the terms below, correctly identify on the diagram all structures provided with leader lines. ventral (anterior) horn dorsal root of spinal nerve spinal nerve arachnoid mater dura mater ventral ramus of spinal nerve central canal lateral horn ventral root of spinal nerve dorsal ramus of spinal nerve pia mater white matter dorsal root ganglion dorsal (posterior) horn
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Across 2. This is the most caudal region of the spinal cord (do not use spaces) 7. Indentation of the spinal cord located in the front at the midline (do not use spaces) 9. Fibers which cross from one side of the brain or spinal cord to the opposite side are ______ fibers. 11. The dorsal root contains this type of nerve fibers 12. Motor neurons leave the spinal cord through this structure (do not use spaces) 13. This important nerve of the cervical plexus supplies the diaphragm 14. This structure contains dorsal and ventral rootlets and roots of the spinal cord exiting the vertebral column between L2 and S1 (do not use spaces) 15. This is a hole in the center of the spinal cord, lined with ependymal cells and contains CSF (do not use spaces) Down 1. The third cranial nerve is 3. This structure is distal to the spinal nerve and contains both motor and sensory nerve fibers 4. The sciatic nerve comes from this nerve plexus 5. The anterior portion of the grey matter of the spinal cord (do not use spaces) 6. Group of spinal nerve rami which come together to form the nerves which go down the upper extremity. Nerves include the ulnar nerve (do not use spaces) 8. This type of tract carries efferent information from the brain, down the cord, to terminate on a lower motor neuron 10. Three columns of white matter run up and down the spinal cord. Each column is called a
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Down 8 & 10 (not shown in image): 8. This type of tract carries efferent information from the brain, down the cord, to terminate on a lower motor neuron. 10. Three columns of white matter run up and down the spinal cord. Each column is called a
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