Definition

Noun: - The deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres: The sulcus lateralis cerebri is a major anatomical landmark in the human brain. It is a deep groove (sulcus) on the lateral surface of each cerebral hemisphere, creating a clear boundary between the frontal lobe and the temporal lobe.

Usage Notes

• This is a highly specialized anatomical term used primarily in neuroscience, medicine, and biology.
• It is often referred to by its more common name, the lateral sulcus or Sylvian fissure.
• The term is typically used in academic, clinical, or descriptive contexts when discussing brain structure, function, or pathology.

Examples

• In an anatomy textbook: "The is one of the earliest-developing fissures in the human fetal brain."
• In a medical report: "The MRI scan shows a small anomaly near the on the right hemisphere."
• In a neuroscience lecture: "Important language functions are localized in the cortex bordering the ."

Advanced Usage

• The is not just a surface feature; it contains buried cortical regions, most notably the insula (or Island of Reil), which is concealed within its depths.
• In neuroimaging and neurosurgery, it serves as a critical landmark for orienting and planning procedures.

Variants and Related Words

• Lateral sulcus: The most common English equivalent term.
• Sylvian fissure: An eponymous term named after Franciscus Sylvius, a 17th-century physician. This is frequently used in clinical settings.
• Fissura lateralis cerebri: The Latin term from which "sulcus lateralis cerebri" is derived.
• Sulcus (plural: sulci): A general term for a groove or furrow on the surface of the brain.
• Fissure: A deep sulcus, often used interchangeably with "sulcus" for major grooves like this one.

Synonyms

• Lateral sulcus
• Sylvian fissure
• Fissura Sylvii

Note: While these terms refer to the same anatomical structure, "sulcus lateralis cerebri" is the precise, formal neuroanatomical name.

Noun

1. the deepest and most prominent of the cortical fissures; separates the frontal lobes and temporal lobes in both hemispheres