---
title: "Corpus Callosum — AP Psychology Definition & Exam Guide"
description: "The corpus callosum is the band of neural fibers linking your brain's two hemispheres. Learn how it powers split-brain research and shows up on the AP Psych exam."
canonical: "https://fiveable.me/ap-psych-revised/key-terms/corpus-callosum"
type: "key-term"
subject: "AP Psychology"
---

# Corpus Callosum — AP Psychology Definition & Exam Guide

## Definition

A large band of neural fibers connecting two hemispheres of brain allowing them to communicate with each other.

## Related Study Guides

- [2.6 The Brain](/ap-psych-revised/unit-2/brain/study-guide/BZ2a9VqBSSAVII90lhUZ)
- [2.7 Tools for Examining Brain Structure and Function](/ap-psych-revised/unit-2/tools-for-examining-brain-structure-function/study-guide/hZsjtISgD4DpzFTMi0Kw)

## Review

### Related Terms

- Split Brain: A condition resulting from surgery that isolates brain's two hemispheres by cutting the fibers (mainly those of corpus callosum) connecting them.
- [Cerebral Cortex](/ap-psych-revised/key-terms/cerebral-cortex): The outermost layer of gray matter making up the superficial aspect of cerebrum. It plays a key role in memory, attention, perception, cognition, awareness, thought, language, and consciousness.
- [Neurons](/ap-psych-revised/key-terms/neurons): These are nerve cells that transmit information throughout our body using electrical impulses.