Created by Terri Street for OKTechMasters © 2000 Adapted by Tom Gest, Anatomical Sciences, University of Michigan Medical School, 2004 Questions developed by Charisa Roy, University of Michigan Medical School Class of 2007

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 A.  C.  B.  D. $100

 A.  C.  B.  D. $100

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A. sympathetic chain C. sensory nerves B. spinal cord D. peripheral nerves Which of the following acts primarily as a highway for information traveling to and from the brain?

A. sympathetic chainB. spinal cord Which of the following acts primarily as a highway for information traveling to and from the brain?

Back to Board The spinal cord carries impulses to and from the brain.

A. intervertebral foramina C. vertebral foramina B. inferior vertebral notch D. superior vertebral notch The spinal cord runs through what vertebral opening?

A. intervertebral foramina C. vertebral foramina The spinal cord runs through what vertebral opening?

Back to Board The spinal cord runs through the vertebral canal, formed by all of the vertebral foramina.

A. dura mater C. pia mater B. arachnoid mater D. subdural mater Denticulate ligaments are specializations of what meningeal membrane?

A. dura mater C. pia mater Denticulate ligaments are specializations of what meningeal membrane?

Back to Board The denticulate ligament is a scallop-shaped lateral extension of the pia mater.

A. above, below C. below, above B. above, above D. below, below In the cervical vertebrae and the thoracic vertebrae, spinal nerves corresponding to the vertebrae emerge where, respectively (excluding T1)?

A. above, below C. below, above In the cervical vertebrae and the thoracic vertebrae, spinal nerves corresponding to the vertebrae emerge where, respectively (excluding T1)?

Back to Board Because there are 8 cervical spinal nerves, they pass over their vertebra; all others pass under.

A. L3/4 C. T12 B. S2 D. L1/L2 The cauda equina typically lies in the lumbar cistern below which vertebral level in an adult?

A. L3/4 D. L1/L2 The cauda equina typically lies in the lumbar cistern below which vertebral level in an adult?

Back to Board The spinal cord ends at L1/2 level, and the cauda equina is the collection of nerve rootlets below it.

A. cervical and thoracic C. thoracic and lumbar B. cervical and lumbar D. thoracic and sacral What spinal cord enlargements contain upper and lower limb motor neurons?

C. thoracic and lumbar B. cervical and lumbar What spinal cord enlargements contain upper and lower limb motor neurons?

Back to Board The cervical enlargement supplies the upper limbs, while the lumbar enlargement supplies the lower limbs.

A. lateral horn C. ventral horn B. dorsal horn D. medial horn Where, in the spinal cord, are the motor neurons that innervate skeletal muscle?

A. lateral horn C. ventral horn Where, in the spinal cord, are the motor neurons that innervate skeletal muscle?

Back to Board Motor neuron cell bodies lie in the ventral horn, while autonomic neuron cell bodies lie in the lateral horn and sensory fibers synapse on cells in the dorsal horn.

A. 33, 31 C. 31, 33 B. 33, 12 D. 12, 33 How many vertebrae and spinal nerves, respectively, are in the body?

A. 33, 31 C. 31, 33 How many vertebrae and spinal nerves, respectively, are in the body?

Back to Board There are 33 vertebrae, 31 pairs of spinal nerves, and 12 pairs of cranial nerves.

A. motor C. afferent B. efferent D. sympathetic What type of fibers are carried by the dorsal roots and rootlets?

C. afferent B. efferent What type of fibers are carried by the dorsal roots and rootlets?

Back to Board Dorsal rootlets and roots carry afferent, sensory fibers to the dorsal horn, where they synapse.

A. motor C. motor and sensory B. sensory D. sympathetic What types of fibers are found within every spinal nerve?

A. motor C. motor and sensory B. sensory D. sympathetic What types of fibers are found within every spinal nerve?

Back to Board Every spinal nerve carries both motor and sensory fibers.

A. ventral, dorsal C. dorsal, dorsal B. ventral, ventral D. dorsal, ventral Axons innervating deep back muscles and muscles of the limb and trunk travel in what rami, respectively?

C. dorsal, dorsal D. dorsal, ventral Axons innervating deep back muscles and muscles of the limb and trunk travel in what rami, respectively?

Back to Board Deep back muscles are innervated by dorsal primary rami, while ventral rami innervate limb muscles.

A. dura mater C. pia mater B. arachnoid mater D. subarachnoid mater Which meningeal membrane layer forms the sleeves for the ventral and dorsal roots as they exit the intervertebral foramina?

A. dura materB. arachnoid mater Which meningeal membrane layer forms the sleeves for the ventral and dorsal roots as they exit the intervertebral foramina?

Back to Board Dura mater forms a sleeve around nerve rootlets as they pass into the intervertebral foramen.

A. spinal nerve C. dorsal rami B. ventral rami D. ventral root Which of the following is NOT a mixed nerve?

B. ventral rami D. ventral root Which of the following is NOT a mixed nerve?

Back to Board Roots are only either sensory or motor, while rami and spinal nerves are both, or mixed.

A. conus medullaris C. cauda equina B. lumbar enlargement D. coccygeal ligament Which structure is the most caudal to the foramen magnum?

C. cauda equina D. coccygeal ligament Which structure is the most caudal to the foramen magnum?

Back to Board The coccygeal ligament extends from the end of the dural sac, while lumbar enlargement, conus medullaris, and cauda equina lie within the dural sac.

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