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.
Pyramidal neurons have soma(body cell) that is of rounded pyramid shape. Hence they are called pyramidal neurons. The characteristic features of pyramidal neurons is the presence of single axon, large apical dendrite along with numerous basal dendrites.
It is a type of multipolar neurons that are found in the cerebral cortex of all mammals. They can also be found in the subcortical regions of amygdala and hippocampus.
The correct answer is option b.
Pyramidal cells axons synapse at motor neurons in the anterior horns of the spinal cord.
Explanation:
The pyramidal cells axon pass through the corticospinal tracts and they join with the motor neurons. The motor neuron are present in the anterior (ventral) horns of the grey matter.
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps
- A person with a spinal cord injury is suffering from paresis (partialparalysis) in the right lower limb. Which of these pathways is probably involved?a. left lateral corticospinal tractb. right lateral corticospinal tractc. left dorsal-column/medial-lemniscal systemd. right dorsal-column/medial-lemniscal systemarrow_forwardIn the spinal cord, the somas of the lower motor neurons are found ina. the cauda equina.b. the posterior horns.c. the anterior horns.d. the posterior root ganglia.e. the fasciculiarrow_forwardChoose the correct math to make the statement true. < >, somatic senses ascend the spinal cord in < > tract. A. <mechanorceptive>, <cuneatus and gracillis> B. <Nociceptive>, <Vagus> C. <proprioceptive>, <spinothalamus> D. <Thermoceptive>, <spinocerebellar>arrow_forward
- Match the description with the statement that best describes them spinal nerve receives sensory input from a specific area of skin carry motor impulses from brainstem "bundles of nerve fibers with a similar origin, destination and function" carry sensory impulses toward brainstem A. ascending tracts B. descending tracts C. spinal tracts D. dermatomearrow_forwardName the structure that the arrow is pointing at.A. ThalamusB. PutamenC. Internal capsule D. Head of caudate nucleusE. Globus pallidusarrow_forward50arrow_forward
- name the structure a. ventral root b. anterior white column c. posterior/ dostal root d. posterior/ doesal root ganglion e. sensory nervesarrow_forwardOcclusion of which of the following arteries is most likely to produce loss of tactile sensation in the let hand ? A.left anterior cerebral b. Left middle cerebral c. Left posterior cerebral D . Left posterior communicating e. Right anterior cerebral f. Right middle cerebral g. Right posterior cerebral h. Right posterior communicatingarrow_forwardWhich of these are not part of an indirect motor pathway?a. rubrospinal tractsb. tectospinal tractsc. corticobulbar tractsd. reticulospinal tractsarrow_forward
- Put the following in the correct order from the spinal cord ventral horn. Drag and drop options into correct order and submit. For keyboard navigation... SHOW MORE ✓ III III III III Mixed spinal nerve Ventral axons Effectors on anterior portion of the body Ventral roots Ventral ramusarrow_forwardMatch the image letter showing cranial nerve dysfunction to the appropriate cranial nerve. A. occulomotor B. glossopharyngeal C. optic D. trigeminal E. facial F. hypoglossal G. abducens H. trochlea I. Accessory J. vestibulocochlear K. olfactory L. vagus A B C D E F G Harrow_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_forward
- Human Anatomy & Physiology (11th Edition)Anatomy and PhysiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONAnatomy & PhysiologyAnatomy and PhysiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,Human AnatomyAnatomy and PhysiologyISBN:9780135168059Author:Marieb, Elaine Nicpon, Brady, Patricia, Mallatt, JonPublisher:Pearson Education, Inc.,
- Anatomy & Physiology: An Integrative ApproachAnatomy and PhysiologyISBN:9780078024283Author:Michael McKinley Dr., Valerie O'Loughlin, Theresa BidlePublisher:McGraw-Hill EducationHuman Anatomy & Physiology (Marieb, Human Anatomy...Anatomy and PhysiologyISBN:9780321927040Author:Elaine N. Marieb, Katja HoehnPublisher:PEARSON