noun
nucleus
A cluster of nerve cell bodies in the brain or spinal cord.
This nucleus in the brain stem helps control eye movements.
Etymology
The Latin word means kernel. Neuroanatomy uses the compact-core image for a localized cluster of nerve cell bodies within the central nervous system.
More examples
- The caudate nucleus helps the brain plan and coordinate movement.
- Several nuclei in the hypothalamus help regulate hunger and thirst.
- Damage to a motor nucleus can weaken the muscles it controls.
Forms
nucleus · nuclei · nucleuses