16) The tail-like collection of spinal nerves at the inferior end of the spinal cord is called the a. conus medullaris. b. lumbosacral enlargement. c. filum terminale. d. cauda equina. 17) The extension of the dura mater that anchors the spinal cord to the coccyx is called the a. conus medullaris. b. lumbosacral enlargement. c. filum terminale. d. cauda equina. 18) Which of the following is not one of the regions of the spinal cord? a. cervical b. thoracic c. lumbar d. sacral e. pelvic 19) Which of the following nerves does not belong to the brachial plexus? a. musculocutaneous b. saphenous c. median d. radial 20) The sacral plexus contains all of the following nerves except the a. sciatic b. tibial c. peroneal d. femoral 21) Which of the following spinal nerves supply the quadriceps? a. sciatic b. peroneal c. femoral d. medial 22) Which of the following information is located in a spinal nerve? a. sensory b. motor c. both a and b d. none of the above 131
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The part of a spinal nerve that contains only efferent fibers is the a. dorsal root b. ventral root c. dorsal ramus d. ventral ramus e. plexus To do a lumbar puncture, the needle is inserted into the a. central canal b. sacral plexus c. nucleus pulposus d. subarachnoid space e. gray commissure The sacral plexus is the origin of a. axillary nerve b. obturator nerve c. femoral nerve d. sciatic nerve e. Both C and D are correct The endoneurium is the a. lining of the central canal of the spinal cord b. space between the pia mater and the spinal cord c. connective tissue surrounding an individual axon d. connective tissue surrounding an entire nerve e. group of neurons forming a spinal tract Spinal nerves emerge from the vertebral column via a. vertebral bodies b. intervertebral discs c. intervertebral foramina d. vertebral foramina e. the central canal
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
Madhur L.
D. Spinal Nerves Complete the sentences with the correct term about the spinal nerves. 1. The sciatic nerve is composed of two nerves, the 2. and the 3. There are _____ pairs of spinal nerves. 4. The nerve that supplies the posterior thigh _____ 5. There is (are) _____ pair(s) of coccygeal nerves. 6. If the anterior (ventral) ramus of a spinal nerve is severed, there is a _____ (motor and/or sensory) loss. 7. There is (are) _____ pair(s) of thoracic nerves. 8. The nerve that supplies the anterior thigh is the _____ 9. There is (are) _____ pair(s) of sacral nerves. 10. There is (are) _____ pair(s) of lumbar nerves. 11. If the posterior (dorsal) ramus of a spinal nerve is severed, the functional loss is _____ (motor and/or sensory). 12. There is (are) _____ pair(s) of cervical nerves. 13. The _____ nerve supplies the deltoid and teres minor muscles. 14. The _____ nerve supplies the triceps brachii muscles and the extensor digitorum longus. 15. The _____ nerve supplies the biceps brachii muscles. 16. The _____ nerve supplies the diaphragm. 17. The _____ nerve supplies most hand muscles. 18. The _____ nerve supplies the flexor carpi radialis.
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