cerebrum

Examples of cerebrum in the following topics:

• Overview of the Cerebrum

  • With the assistance of the cerebellum, the cerebrum controls all voluntary actions in the body.
  • The cerebrum, which lies in front or on top of the brainstem, comprises a large portion of the brain.
  • The cerebrum is the newest structure in the phylogenetic sense, with mammals having the largest and most developed among all species.
  • With the assistance of the cerebellum, the cerebrum controls all voluntary actions in the body.
  • The cerebrum directs the conscious or volitional motor functions of the body.

• Cerebral Cortex

  • The cerebral cortex, the largest part of the mammalian brain, is the wrinkly gray outer covering of the cerebrum.
  • Beneath the cerebral cortex is the cerebrum, which serves as the main thought and control center of the brain.
  • The cerebrum is composed of gray and white matter.
  • 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

  • It consists mostly of glial cells and myelinated axons and forms the bulk of the deep parts of the cerebrum and the superficial parts of the spinal cord.
  • 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.
  • Projection tracts extend vertically between higher and lower brain areas and spinal cord centers, and carry information between the cerebrum and the rest of the body.
  • Commissural tracts enable the left and right sides of the cerebrum to communicate with each other.

• Spinal Cord White Matter

  • It consists mostly of glial cells and myelinated axons that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centers.
  • They carry information between the cerebrum and the rest of the body.
  • The cortico spinal tracts, for example, carry motor signals from the cerebrum to the brainstem and spinal cord.
  • Commissural tracts enable the left and right sides of the cerebrum to communicate with each other.
  • 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 Central Nervous System (CNS)

  • The brain is found in the cranial cavity and consists of the cerebrum and cerebellum.
  • The cerebrum, or the top portion for the brain, is the seat of higher-level thought.
  • The cerebellum is located underneath the backside of the cerebrum, and governs balance and fine motor movements.

• Functions of the Brain Stem

  • It contains tracts that carry signals from the cerebrum to the medulla and to the cerebellum.
  • All information relayed from the body to the cerebrum and cerebellum and vice versa must traverse the brainstem.
  • Only the first and the second pair emerge from the cerebrum; the remaining ten pairs emerge from the brainstem.

• Grey and White Matter

  • Both the cerebrum and cerebellum have an outer additional layer of gray 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.

• The Brain

  • As a rule, the smaller the cerebrum, the less convoluted the cortex.
  • The cerebrum is attached to a stalk-like structure called the brain stem, which consists of the midbrain, pons, and medulla.
  • At the rear of the brain beneath the cerebrum and behind the brainstem is the cerebellum.

• Amoebic Meningoencephalitis

  • After the organisms have multiplied and largely consumed the olfactory bulbs, the infection rapidly spreads through the mitral cell axons to the rest of the cerebrum, resulting in onset of frank encephalitic symptoms, including cephalgia (headache), nausea, and rigidity of the neck muscles, progressing to vomiting, delirium, seizures, and eventually irreversible coma.

• Proprioceptive Sensations

  • Conscious proprioception is communicated by the posterior (dorsal) column-medial lemniscus pathway to the cerebrum.