Identify the correct statement(s) I. spinal nerve plexuses are derived from ventral and dorsal rami II. the cords of the brachial plexus give off a total of eight nerves III. the upper trunk gives off nerve to subclavius and suprascapular nerve IV. nerves given off by the medial cord are supplied by ventral rami of C8-T1 Select one: a. II, III, and IV only b. I and II only c. II and III only d. all of the above
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Spinal nerve plexuses (cervical, brachial, lumbar, sacral) are formed by the ventral rami of spinal nerves. The dorsal rami typically innervate the deep muscles and skin of the back segmentally and do not form plexuses. Therefore, this statement is incorrect Show more…
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Which of the following statements are incorrect? I. The spinal cord extends from the medulla oblongata superiorly to the level of L2 inferiorly. II. The smaller bifurcation of the spinal nerve, the dorsal ramus, supplies only deep back muscles. III. The inferior end of the spinal cord is termed conus medullaris for the conical shape it exhibits. IV. The spinal cord receives blood supply from arteries clinically referred to as Batson's arteries. Select one: a. Only two of the above. b. Only one of the above. c. Only three of the above. d. All of the above. e. None of the above. Which is correct regarding the spinal cord? Select one: a. White matter is composed mainly of nerve fibers (mainly axons) within the CNS. b. Dorsal and ventral horns are motor and sensory, respectively. c. The dorsal root contains cell bodies of motor neurons. d. A ganglion is a collection of cell bodies within the peripheral nervous system. e. There are 31 spinal nerves.
Madhur L.
Which of the following statements concerning the structure of spinal nerves is true? Select all that apply. A. The ventral root contains motor or efferent fibers. B. The tibial nerve is involved when a dancer points his/her toes. C. Rootlets from the surface of the spinal cord form the dorsal and ventral rami. D. Spinal nerves exiting the cord from the level of L4 to about S4 form the sacral plexus. E. Spinal nerves do not have specific cutaneous distributions.
Adi S.
7. The ventral root of a spinal nerve contains A. only sensory fibers. B. only motor fibers. C. only afferent fibers. D. both sensory and motor fibers. E. a ganglion. 8. During a spinal tap, cerebrospinal fluid is obtained from which of the following locations? A. dural sinus B. epidural space C. subarachnoid space D. subdural space E. sagittal sinus 9. The lumbosacral plexus supplies nerves that function to contract which of the following? A. the diaphragm B. intercostal muscles C. muscles of the arm and forearm D. muscles of the lower limb E. abdominal muscles. 10. Ventral rami of some spinal nerves join with each other to form a A. ganglion. B. dermatome C. cord. D. plexus. E. nerve. 11. Which of the following nerves is part of the brachial plexus? A. peroneal B. ansa cervicalis C. ischiadic (sciatic) D. musculocutaneous E. femoral. 12. Which of the following is correctly associated with the medulla oblongata? A. It gives rise to conscious thoughts. B. It contains nuclei for regulation of heart rate and blood vessel diameter. C. It contains enlargements called cerebral peduncles. D. It is the most superior portion of the brainstem. E. It relays sensory information. 13. Consider the following five terms and determine which does not belong: A. pons B. medulla C. cardiac center D. pyramids E. olives
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