Definition

Noun: - A specific anatomical groove in the brain: The Fissure of Rolando is the anatomical name for the central sulcus of the brain. It is a prominent, deep groove that runs in a generally vertical direction on the lateral surface of each cerebral hemisphere. Its primary function is to separate the frontal lobe from the parietal lobe.

Usage

The term is used exclusively in specialized anatomical, neurological, and medical contexts to precisely identify this key landmark of the brain's surface anatomy. - The neurosurgeon carefully avoided the Fissure of Rolando during the procedure. - In the diagram, the Fissure of Rolando is clearly marked as the boundary between the motor and sensory cortices.

Advanced Usage

• As a key anatomical landmark: The Fissure of Rolando is critical for neuroanatomical orientation. The precentral gyrus (primary motor cortex) lies immediately in front of it, and the postcentral gyrus (primary somatosensory cortex) lies immediately behind it.
  • Stimulation of the cortex anterior to the Fissure of Rolando can elicit muscle movements.

Variants and Related Words

• Central Sulcus: This is the more common modern equivalent term for the Fissure of Rolando. The two terms are used interchangeably in medical literature.
  • The central sulcus (Fissure of Rolando) is one of the earliest sulci to develop in the fetal brain.

Synonyms

• Central Sulcus: The standard synonym in neuroanatomy.

Noun

1. a brain fissure extending upward on the lateral surface of both hemispheres; separates the frontal and parietal lobes