grey matter

Examples of grey matter in the following topics:

• Grey and White Matter

  • The basic pattern of the CNS is a central cavity surrounded by gray matter external to which is the white matter.
  • Grey matter is distributed at the surface of the cerebral hemispheres and cerebellum, as well as in the depths of the cerebrum, cerebellar, brainstem, and spinal grey matter.
  • A second major component of the central nervous system is white matter and it is composed of bundles of myelinated axons that connect various grey matter regions of the nervous system to each other and carry nerve impulses between neurons .
  • Micrograph showing grey matter, with the characteristic neuronal cell bodies (right of image - darker pink), and white matter with its characteristic fine mesh work-like appearance (left of image - lighter pink).
  • Distinguish between grey and white matter of the central nervous system

• Spinal Cord Grey Matter and Spinal Roots

  • The grey matter of the spinal cord contains neuronal cell bodies, dendrites, axons, and nerve synapeses.
  • Damage to the grey matter (eg, the ventral gray horn) may lead to tingling and muscle weakness.
  • Projections of the grey matter (the "wings") are called horns.
  • Together, the grey horns and the grey commissure form the H-shaped grey matter.
  • Describe the grey matter and spinal roots of the spinal cord

• Spinal Cord White Matter

  • While grey matter is primarily associated with processing and cognition, white matter modulates the distribution of action potentials, acting as a relay and coordinating communication between different brain regions.
  • White matter is composed of bundles of myelinated nerve cell processes (or axons), which connect various grey matter areas (the locations of nerve cell bodies) of the brain to each other and carry nerve impulses between neurons.
  • Cerebral and spinal white matter do not contain dendrites, which can only be found in grey matter along with neural cell bodies, and shorter axons.
  • The cerebellum is structured in a similar manner as the cerebrum, with a superficial mantle of cerebellar cortex, deep cerebellar white matter (called the "arbor vitae") and aggregates of grey matter surrounded by deep cerebellar white matter (dentate nucleus, globose nucleus, emboliform nucleus, and fastigial nucleus).
  • The spinal cord diagram showing location of the white matter surrounding grey matter.

• Spinal Cord

  • Myelinated axons (the part of neurons that send signals) compose the "white matter," while neuron and glial cell bodies (neuronal "support" cells) compose the "grey matter."
  • Grey matter is also composed of interneurons, which connect two neurons, each located in different parts of the body.
  • A cross-section of the spinal cord shows grey matter (containing cell bodies and interneurons) and white matter (containing axons).

• Cerebral Cortex

  • The cerebrum is composed of gray and white matter.
  • Gray matter is the mass of all the cell bodies, dendrites, and synapses of neurons interlaced with one another, while white matter consists of the long, myelin-coated axons of those neurons connecting masses of gray matter to each other.
  • A sagittal cross-section of a human brain showing the distinct layers of grey matter (the darker outer layer) and white matter (the lighter inner layer) in the cerebrum.

• White Matter of the Cerebrum

  • White matter is one of the two components of the central nervous system (CNS).
  • The axons of white matter transmit signals from various grey matter areas (the locations of nerve cell bodies) of the cerebrum to each other and carry nerve impulses between neurons.
  • While grey matter is primarily associated with processing and cognition, white matter modulates the distribution of action potentials, acting as a relay and coordinating communication between different brain regions.
  • White matter appears white in this dissected human brain, while gray matter appears darker.
  • White matter is composed largely of myelinated axons.

• Lower-Level Structures

  • It consists of two lobes of grey matter along the bottom of the cerebral cortex.

• The Periodic Table

  • Matter comprises all of the physical objects in the universe, those that take up space and have mass.
  • All matter is composed of atoms of one or more elements, pure substances with specific chemical and physical properties.
  • The elements at the boundary between the metallic elements (grey elements) and nonmetal elements (green elements) are metalloid in character (pink elements).
  • Within the p-block at the boundary between the metallic elements (grey elements) and nonmetal elements (green elements) there is positioned boron and silicon that are metalloid in character (pink elements), i.e., they have low electrical conductivity that increases with temperature.

• How a business can save water

  • Recycle ‘grey water' and rainwater.
  • The irony is that recycled water from sinks, showers, production processes, washing machines and drinking fountains (also known as ‘grey water') can often be used in place of tap water.
  • Potable bottled water cost twice as much as petrol, so we used grey water (from a sewage treatment plant) in our drip irrigation system.

• Matter and Antimatter

  • Antimatter is composed of antiparticles, which have the same mass as particles of ordinary matter but opposite charge and quantum spin.
  • Matter-antimatter reactions have practical applications in medical imaging, such as in positron emission tomography (PET).
  • Antiparticles bind with each other to form antimatter in the same way that normal particles bind to form normal matter.
  • Almost all matter observable from the earth seems to be made of matter rather than antimatter.
  • Antimatter galaxies, if they exist, are expected to have the same chemistry and absorption and emission spectra as normal-matter galaxies, and their astronomical objects would be observationally identical, making them difficult to distinguish from normal-matter galaxies.