A. Asterion

B. Occipitomastoid suture

C. Sagittal suture

D. Lamboid suture

Brief Discussion: Can

A. Superior frontal sulcus

B. Central sulcus

C. Postcentral sulcus

D. Pars marginalis of the cingulate sulcus

Brief Discussion: These are key sulci of the vertex. Note the numerous signs including the upturned mustache sign of the pars marginalis, the bifurcated postcentral gyrus termination, and the medial central sulcus termination pointed posteriorly towards the pars marginalis.

A. Sylvian fissure

B. Superior temporal sulcus

C. Inferior temporal sulcus

Brief Discussion: The superior temporal sulcus is sometimes called the parallel sulcus as it courses parallel to the Sylvian fissure and is relatively prominent. The inferior temporal sulcus is often discontinuous and relatively shallow.

A. Pars marginalis of the cingulate sulcus

B. Parieto-occipital fissure

C. Calcarine sulcus

D. Tentorium

Brief Discussion: These structures are consistently identified in a (near) midline sagittal image of the brain. They help define key regions or gyri that have relatively consistent shapes and important functions.

A. Central sulcus

Brief Discussion: Note the subcentral U sign, little t sign, and triple sulcus signs, all of which help identify this as the central sulcus.

A. Inferior frontal sulcus

Brief Discussion: The inferior frontal sulcus terminates in T-bone fashion with the precentral sulcus (small t sign).

These are components of the lateral portion of the Sylvian fissure.

A. Anterior horizontal ramus

B. Anterior ascending ramus

C. Posterior horizontal ramus

Brief Discussion: The Sylvian fissure define key areas of the frontal and parietal lobes. The anterior rami dived the inferior frontal gyrus into important subcomponents.

A. Collateral sulcus proper

B. Lateral occipito-temporal sulcus

C. Occipital extension of the collateral sulcus

Brief Discussion: The collateral sulcus has multiple subcomponents and separates the parahippocampal gyrus or lingual gyrus from the lateral occipitotemporal gyrus.