What is the grey matter in the spinal cord?

What is the grey matter in the spinal cord?

The grey matter in the center of the cord contains interneurons and the cell bodies of motor neurons, axons, and dendrites. Projections of the grey matter (the “wings”) are called horns. Together, the grey horns and the grey commissure form the H-shaped grey matter.

Why is the grey matter of spinal cord Look H shaped in histological structure?

The grey matter is also named after its unfixed histological appearance and contains the cell bodies of neurons as well as nerve fibres. Within the spinal cord the grey matter forms an H-shape where the ventral horns of the H are broader than the dorsal horns.

What are the histological differences between white matter and gray matter?

Grey matter contains the cell bodies (perikarya) of neurons and the supporting cells (neuroglia) as well as unmyelinated dendrites. White matter does not contain any cell bodies, but mostly contains myelinated nerve fibres.

What is grey matter composed of?

Gray matter consists primarily of neuronal cell bodies, or soma. This a spherical structure that houses the neuron’s nucleus.

What is gray matter of the spinal cord composed of quizlet?

-The gray matter of the spinal cord is shaped like the letter H or a butterfly; it consists of dendrites and cell bodies of neurons, unmyelinated axons, and neuroglia.

What is the difference in the location of grey matter in brain and spinal cord?

In the brain proper, grey matter forms the outer layer of the brain, and white matter forms the inner layer. In the spine, this is reversed: white matter forms the outer layer of the spine, and grey matter the inner layer.

What is the difference between white and gray matter in the spinal cord?

White matter is the whitish nerve tissue of the central nervous system that is mainly composed of myelinated nerve fibers (or axons). The central nervous system is the brain and spinal cord. And gray matter is grayish nerve tissue of the central nervous system mainly composed of nerve cell bodies and dendrites.

Why is gray matter Unmyelinated?

Grey matter also contains axons, which are long extensions on cells, branched from the neuronal cell bodies. These axons are usually unmyelinated, meaning they are not covered by a white-ish fatty protein called myelin.

What is white matter in histology?

The white matter contains nerve fibers (axons) entering and exiting the gray matter, and traveling up and down the spinal cord, linking it to the brain. Nervous tissue contains two basic categories of cells: neurons and support cells (glia).

Which statement is true of grey matter?

The correct answer is (a): It makes up the outer tissue layer in the brain. Gray matter consists of cell bodies and unmyelinated neural processes,… See full answer below.

What is the grey matter composed of?

neuronal cell bodies
Gray matter consists primarily of neuronal cell bodies, or soma. This a spherical structure that houses the neuron’s nucleus.

What are the components of gray matter?

Grey matter is a major component of the central nervous system, consisting of neuronal cell bodies, neuropil (dendrites and unmyelinated axons), glial cells (astrocytes and oligodendrocytes), synapses, and capillaries.

What is the arrangement of white and gray matter in the spinal cord?

The arrangement of gray and white matter in the spinal cord is relatively simple: The interior of the cord is formed by gray matter, which is surrounded by white matter (Figure 1.11A).

What is the composition of the gray and white matter?

Overview. The tissue called “gray matter” in the brain and spinal cord is also known as substantia grisea, and is made up of cell bodies. “White matter”, or substantia alba, is composed of nerve fibers.

Where does gray matter come from?

The colour difference arises mainly from the whiteness of myelin. In living tissue, grey matter actually has a very light grey colour with yellowish or pinkish hues, which come from capillary blood vessels and neuronal cell bodies….

Grey matter
TA2 5365
FMA 67242
Anatomical terminology

Where is grey matter located in the spinal cord?

Motor areas – responsible for voluntary movement.

  • Sensory areas – responsible for conscious awareness of external and internal body sensations,including hearing,smell,and taste.
  • Association areas – regions of the cerebral cortex which integrate incoming sensory information,and form connections between the motor and sensory areas.
  • What are the functions of gray matter?

    – memory, – emotions, – speech, – self-control, – decision making, – seeing, – hearing, etc.

    What is inflammation of the grey matter of the spinal cord?

    Acute transverse myelitis is acute inflammation of gray and white matter in one or more adjacent spinal cord segments, usually thoracic. Causes include multiple sclerosis, neuromyelitis optica, infections, autoimmune or postinfectious inflammation, vasculitis, and certain drugs.

    What does the gray horns of the spinal cord contain?

    Four Columns of the Spinal Cord Grey Matter. The dorsal horn (also known as the posterior horn) contains neurons that receive somatosensory information from the body,which is then transmitted

  • Spinal Cord Nuclei.
  • Rexed Laminae.