**Question:** Corpus rotation in relation to cranium is known as

A. Transverse rotation
B. Anteroposterior rotation
C. Lateral rotation
D. Sagittal rotation

**Core Concept:**
The term "corpus rotation" refers to the movement of the brain within the skull, specifically its rotation around the longitudinal axis. In the context of the skull, rotation can occur in different planes: transverse, anteroposterior, lateral, and sagittal.

**Why the Correct Answer is Right:**
Corpus rotation can occur in any plane, but the correct term for rotation around the longitudinal axis is sagittal rotation. This type of rotation is an essential concept in understanding various neurological disorders and their imaging findings.

**Why Each Wrong Option is Incorrect:**
A. Transverse rotation (option A) is not the correct term for rotation around the longitudinal axis.
B. Anteroposterior rotation (option B) is related to the movement of the brain along its anterior-posterior axis but not around the longitudinal axis.
C. Lateral rotation (option C) is related to the movement of the brain around the horizontal axis, not around the longitudinal axis.
D. Sagittal rotation (option D) is the correct term for rotation around the longitudinal axis and is essential for understanding neurological disorders and imaging findings.

**Clinical Pearl / High-Yield Fact:**
Corpus rotation, particularly sagittal rotation, is crucial when interpreting neuroimaging studies, such as MRI or CT scans, as it can help identify abnormalities in brain tissue, such as tumors or vascular malformations, that may cause neurological symptoms. A thorough understanding of corpus rotation is essential for accurate diagnosis and treatment planning.

**Correct Answer:** D. Sagittal rotation