Definition

Noun A type of glial cell in the central nervous system characterized by a star-shaped appearance with long, slender, unbranched processes. These cells are primarily located in the white matter of the brain and spinal cord.

Usage

The term "fibrous astrocyte" is used in neuroscience and neuroanatomy to classify and describe a specific subtype of astrocyte based on its morphology and location. * Under the microscope, the fibrous astrocyte was distinguished by its long, fibrous processes. * The study compared the density of fibrous astrocytes in different regions of the white matter.

Advanced Usage

• Pathological Context: In medical literature, "fibrous astrocyte" is often discussed in the context of gliosis, a reactive change where these cells proliferate and form a glial scar in response to central nervous system injury.
  • The lesion site showed a proliferation of reactive fibrous astrocytes.

Variants and Related Words

• Astrocyte (n): The broader category of star-shaped glial cells, which includes both fibrous and protoplasmic astrocytes.
• Protoplasmic Astrocyte (n): The other main subtype of astrocyte, characterized by shorter, highly branched processes and found predominantly in the gray matter.
• Gliosis (n): A condition involving the proliferation of astrocytes, including fibrous astrocytes, in damaged areas of the brain or spinal cord.

Synonyms

• Fibrillary Astrocyte (n): A direct synonym often used interchangeably in scientific texts.

Related Phrases

• White matter astrocyte: A descriptive phrase highlighting the primary location of fibrous astrocytes, though it is less precise as a technical term.

Noun

1. star-shaped cells with long processes; found in the white matter of the brain and spinal cord