LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 17, Problem 5MC
Pyramidal cell axons project through corticospinal tracts and synapse at
| a. | motor nuclei of cranial nerves. |
| b. | motor neurons in the anterior horns of the spinal cord. |
| c. | motor neurons in the posterior horns of the spinal cord. |
| d. | motor neurons in the lateral horns of the spinal cord. |
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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.
Pyramidal cell axons project through corticospinal tracts andsynapse ata. motor nuclei of cranial nerves.b. motor neurons in the anterior horns of the spinalcord.c. motor neurons in the posterior horns of the spinalcord.d. motor neurons in the lateral horns of the spinalcord.
All of the following are true regarding the descending motor tracts EXCEPT
which one?
A. They originate in either the cerebral cortex or brainstem.
B. The pathways are generally made of a two-neuron system.
C. The upper motor neuron fibers target lower motor neurons of the spinal cord or
cranial nerves.
D. They are involved in assisting with voluntary movement.
Chapter 17 Solutions
LooseLeaf for Human Anatomy
Ch. 17 - What is meant by somatotopy?Ch. 17 - What information is conducted by sensory pathways?Ch. 17 - Prob. 3WYLCh. 17 - Prob. 4WYLCh. 17 - Prob. 5WYLCh. 17 - Compare and contrast the upper and lower motor...Ch. 17 - What is the primary difference between direct and...Ch. 17 - Prob. 8WYLCh. 17 - Distinguish between the activities controlled by...Ch. 17 - What is the function of the Wernicke area?
Ch. 17 - Prob. 11WYLCh. 17 - Prob. 12WYLCh. 17 - Prob. 13WYLCh. 17 - What are the main differences between non-REM and...Ch. 17 - Match each number item with the most closely...Ch. 17 - Prob. 1MCCh. 17 - Prob. 2MCCh. 17 - Prob. 3MCCh. 17 - Prob. 4MCCh. 17 - Pyramidal cell axons project through corticospinal...Ch. 17 - Prob. 6MCCh. 17 - Prob. 7MCCh. 17 - Prob. 8MCCh. 17 - Prob. 9MCCh. 17 - Where are tertiary neurons located? a. extending...Ch. 17 - Prob. 1CRCh. 17 - Prob. 2CRCh. 17 - What are the main differences between the indirect...Ch. 17 - Prob. 4CRCh. 17 - Prob. 5CRCh. 17 - Prob. 6CRCh. 17 - Explain the process by which something may be...Ch. 17 - Describe the activities of the reticular...Ch. 17 - Compare and contrast the amount of sleep infants,...Ch. 17 - What is the consequence of reduction in the number...Ch. 17 - Prob. 1DCRCh. 17 - Prob. 2DCR
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The 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.arrow_forwardSensory neurons transmit information towards the central nervous system. Which of the following is true concerning the movement of peripheral- information towards the central nervous system? A. Dendrites of the sensory neurons synapse with interneurons of the spinal cord. B. Axons of the sensory neurons synapse with motor neurons of the muscles involved in the spinal reflex. C. Axons of the motor neurons synapse with the interneurons of the spinal cord. D. Axons of the sensory neurons synapse with the interneurons of the spinal cord.arrow_forwardLabel the following components of the corticospinal tracts with numbers 1 through 6, with 1 being the origin of the tracts and 6their destination. a. _____ Medullary pyramids where most fibers decussate b. _____ Anterior horn of the spinal gray matter c. _____ Midbrain and pons d. _____ Upper motor neurons in the primary motor andpremotor cortices e. _____ Corona radiata and internal capsule f. _____ Lateral funiculus of the spinal cordarrow_forward
- Spastic paralysis may occur when there is damage to a.the lower motor neurons. b.the upper motor neurons. c.either the lower or the upper motor neurons. d.Spastic paralysis would not result from either of these types of damage.arrow_forwardWhich of the following describes the ascending tracts and the descending tracts of the spinal cord? A. The ascending tracts contain motor impulses, and the descending tracts contain sensory information.B. Both the ascending and descending tracts contain sensory information.C. The ascending tracts contain sensory information, and the descending tracts contain the motor impulses.D. Both the ascending and descending tracts contain motor impulses.arrow_forwardWhich of the following is correct? tertiary neurons found by:- a. extending between the posterior horn and anterior horn b. extending between the posterior horn and the brainstem c. extending between the thalamus and the primary somatosensory cortex d. extending between the primary motor cortex and brainstemarrow_forward
- Mark the following statements about the spinal cord as true or false. If a statement is false, correct it to make a true statement.a. The spinal cord functions as a relay and processing station.b. The spinal cord extends from the foramen magnum to the level between the first and second lumbar vertebrae.c. The epidural space around the spinal cord is only a potential space.d. The posterior horn of spinal gray matter contains the cell bodies of motor neurons.e. The corticospinal tracts are the main sensory tracts in the spinal cordarrow_forwardWhich of the following statements regarding sciatic nerve is correct? a. Arises from L3/4/5/S1/2 b. Emerges from the lower border of piriformis c. Most commonly divides onto common peroneal and tibial branches in the middle of the hamstring compartment d. Can be injured by intramuscular injections in the upper outer quadrant of the buttock e. Gives no branches in the gluteal compartmentarrow_forwardWhich of the following does not describe the spinal nerves? A.They are created through a combination of dorsal and ventral roots. B. They exit the vertebral column through intervertebral spaces. C. Some are made up of only sensory fibers, while others are made up of motor fibers. D. There are thirty-one spinal nerves. They are named based on where they exit the vertebral column.arrow_forward
- surrounds a bundle of nerve fibers A. Neurium B. Perineurium C. Epineurium D. Endoneurium E. None of the abovearrow_forwardThe white matter of the spinal cord is composed primarily ofa. unmyelinated axons.b. neurolemmocytes and satellite cells.c. myelinated axons.d. cell bodies of neuronsarrow_forwardDamage to the surface tissue of the spinal cord will most likely affecta. information processing within the spinal cord.b. the stimulation of sensory organs.c. communication between the peripheral nervous system and the brain.d. reflex arcs.arrow_forward
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