If a Patien t has gray Mater le brain and Spinal Cord; how W
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
Section: Chapter Questions
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Transcribed Image Text:**Understanding Gray Matter vs. White Matter Lesions**
**Question:**
If a patient has gray matter lesions in the brain and spinal cord, how would it be different from white matter lesions in the brain and spinal cord?
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**Explanation:**
In the central nervous system, gray matter and white matter serve different functions. Gray matter primarily consists of neuronal cell bodies and is involved in processing and regulating information in the brain. In contrast, white matter consists of myelinated axons that act as communication highways between different brain regions and spinal cord, facilitating the transmission of signals.
**Gray Matter Lesions:**
- Typically impact processing and regulation of information.
- May affect cognitive functions, leading to issues with memory, perception, or decision-making.
- Could result in motor control problems depending on the location of the lesions.
**White Matter Lesions:**
- Often disrupt the communication between different brain regions.
- Can cause coordination issues, sensory deficits, or problems with reflexes.
- May be linked to conditions like multiple sclerosis, leading to widespread neurological symptoms.
Understanding the differences in how these lesions impact the brain and spinal cord helps in diagnosing and treating neurological conditions.
Expert Solution
Step 1
White matter is formed of dense collection of myelinated axons. In brain, the white matter is present deeper to the gray matter. In spinal cord, the white matter forms the outer layer.
The gray matter is formed of unmyelinated axons, cell bodies, dendrites and neuroglia cells. In brain, the outer layer and the inner nuclei are formed of gray matter and in spinal cord it is present inside the white matter.
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