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The Descending Tracts (Pyramidal and the Extra Pyramidal)

Duration: 19:33

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grovermj@*.com

Mar 02 2020, 5:33 pm

Good explanation but a lot of information to cover

In this anatomy lecture, Drbeen faculty Dr. Adam Jones discusses the descending tracts. They are the pathways by which motor impulses are sent from the brain to the lower motor neurons. This results in the lower motor neurons innervating muscles to produce movement. It is clinically important to understand these tracts when considering nerve lesions and bleeding. The following structural elements are presented and discussed.

The descending tracts
Upper motor neuron
Lower motor neuron
Pyramidal tracts
Extrapyramidal tracts
Corticospinal tracts
Corticobulbar tracts
Tectospinal tracts
Reticulospinal tract
Vestibulospinal tract
Rubrospinal tract
Decussation
Internal Capsula
Basal Ganglia
Corticospinal lesion
Hemiballismus

* Identify cell types in the brain and spinal cord, including functional neurons and parenchymal cells.

* Describe the functions of microglia, macroglia (astrocytes and oligodendrocytes), ependymal cells, and tanycytes.

* Understand the myelination process by Schwann cells in the PNS and oligodendrocytes in the CNS.

* Differentiate between neuron types: apolar, pseudounipolar, bipolar, and multipolar.

* Recognize the role of astrocytes in astrogliosis and scar formation in injured brain tissue.

* Explain anterograde and retrograde movement within neurons, distinguishing between fast and slow anterograde movements

Following answers are created by ChatGPT. Occasionally the answer may be harmful, incorrect, false, misleading, incomplete, or limited in knowledge of world. Please contact your doctor for all healthcare decisions. Also, double check the answer provided by the AI below.

Faculty

In addition to the presenter, following authors may have helped with the content writing, review, or approval:

Adam Jones MD

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