Definition

Noun: A surgical procedure in which a circular piece of bone, specifically from the skull, is removed. This creates an opening in the cranium.

Usage

Trephination is a precise medical term. It is used to describe a specific historical or modern neurosurgical operation. * It is primarily used in medical, historical, and anthropological contexts. * The word is typically used as a countable noun (e.g., a trephination, multiple trephinations).

Examples

• Medical Context:
• Historical/Anthropological Context:
• Describing the Procedure:

Advanced Usage

• The act of performing this surgery can be described with the verb "to trephine".
  • The surgeon needed to trephine the skull to access the hematoma.
• The instrument used is called a "trephine" (a noun).
  • He selected a trephine of the correct diameter for the procedure.

Variants and Related Words

• Trephine (noun): The surgical instrument, like a small circular saw, used to perform a trephination.
• Trephine (verb): To operate on with a trephine; to perform a trephination.
• Trepanation: A synonym often used interchangeably, especially in historical and anthropological contexts. (Note: Some specialists make a technical distinction between the tools used—trephine vs. trepan—but the terms are largely synonymous in general usage).
• Craniotomy: A related but broader term for any surgical opening into the skull, which may or may not involve the removal of a circular bone section.

Synonyms

• Trepanation
• Craniotomy (in a general sense, though not all craniotomies are trephinations)

Notes on Meaning

Trephination refers specifically to the removal of a circular disk of bone. It is not a general term for any brain surgery. Its purposes have included treating head injuries, relieving intracranial pressure, and, in ancient times, possibly releasing evil spirits believed to cause illness.

Noun

1. an operation that removes a circular section of bone from the skull