Definition

Noun: * An external ring of striated muscle surrounding the anus: This is the anatomical name for the voluntary, skeletal muscle that forms the outer part of the anal sphincter complex. It is under conscious control and is primarily responsible for maintaining fecal continence.

Usage

The term "musculus sphincter ani externus" is a precise, formal anatomical term. It is used almost exclusively in medical, anatomical, and biological contexts. * It is typically used to describe the specific muscle's structure, function, or involvement in clinical conditions. * In everyday language, this structure is commonly referred to simply as the "external anal sphincter."

Examples

• The surgeon carefully identified and repaired the torn musculus sphincter ani externus.
• Control of the musculus sphincter ani externus is mediated by the pudendal nerve.
• The study compared the muscle fiber composition of the musculus sphincter ani externus in different age groups.

Advanced Usage

• The term is often abbreviated in medical notes as EAS (External Anal Sphincter).
• It is frequently discussed in relation to its counterpart, the (internal anal sphincter), which is composed of smooth, involuntary muscle.

Variants and Related Words

• External anal sphincter (EAS): The common clinical and simplified term for "musculus sphincter ani externus."
• Anal sphincter complex: Refers to the entire structure responsible for anal continence, which includes both the external (musculus sphincter ani externus) and internal sphincter muscles.
• Sphincter: A general term for a circular muscle that constricts or closes a passage or opening in the body.

Synonyms

• External anal sphincter
• EAS
• Outer anal sphincter (less common)

Related Phrases

• Sphincter ani externus: A slightly shortened, but still formal, version of the full Latin term.
• Voluntary anal sphincter: A descriptive phrase emphasizing its conscious control, in contrast to the involuntary internal sphincter.

Noun

1. an external ring of striated muscle surrounding the anus