Each of the following is true of the spinal cord, except: it ______________. a.carries sensory input b.carries motor output c.contains dorsal horns d.contains a central sulcus e.major reflex center
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Each of the following is true of the spinal cord, except: it ______________.
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- The vertebral canal is occupied by a bundle of spinal nerve roots called a. the terminal filum. b.Below L2 the descending tracts. c. the gracile fasciculus. d. the medullary cone. e. the cauda equina.Describe the spinal cord according to: A. location B. shape and length C. vertebral levels of upper and lower extremities D. distribution of gray and white matter E. anatomical enlargements F. features at distal end G. attachment of spinal nervesIn adults, the spinal cord is not the same length as the vertebral canal, and most of the lumbar part of the spinal cord is within A. the coccyx. B. the sacrum. C. the cervical vertebrae. D. the thoracic vertebrae. E. the cauda equina.
- All of the following are functions of the spinal cord except A) mediates quick and involuntary response to a stimuli B) helps maintain posture and equilibrium during locomotion C) receives sensory input and sends motor signals through spinal nerves D) the only control center for parasympathetic nervous systemThe thoracic spinal cord has the smallest dorsal horn area because: a. the trunk is the most innervated area of the body and therefore there are more projections into the dorsal horn there. b. the trunk is the least innervated area of the body and therefore there are fewer projections into the dorsal horn there. c. most of the descending upper motor neurons have already entered the ventral horn. d. There are many motor neurons to control the small muscles around the spine.Select the statement that best describes the local circuitry of the spinal cord. a. There is no local circuitry within the spinal cord. b. Local circuits enable the same neurons to innervate both distal and proximal muscles. c. Neurons that innervate distal muscles are interconnected across the midline. d. None of the answers. e. Neurons that innervate proximal muscles are interconnected through many spiral cord segments.
- Spinal nerves are called mixed nerves because they (a) are associated with a pair of dorsal root ganglia. (b) exit at intervertebral foramina. (c) contain sensory and motor fibers. (d) are associated with a pair of dorsal and ventral roots.Which of the following is the least likely to relate to the cervical plexus? A:Median nerve B:Nerves for neck muscles C:Nerves for shoulder muscles D:Phrenic nerveBill and Mary were involved in an accident, and each experienced lossof proprioception, fine touch, and vibration on the left side of the bodybelow the waist. Physicians determined by magnetic resonance imaging(MRI) that Bill had damage to his spinal cord and that Mary had damageto her brainstem. Explain which side of the spinal cord was damaged inBill and which side of the brainstem was damaged in Mary
- (a) What are the superior and inferior boundaries of the spinal cord in the vertebral canal? (b) A correctly executed lumbar spinal tap could poke the cauda equina or filum terminale, but not the conus medullaris. Explain.Which of these is not a region of the spinal cord? a. cervical b. thoracic c. pelvic d. lumbar e. sacralList the two main functions of the spinal cord.