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Body of lateral ventricle

The body of the lateral ventricle (central part) is the largest portion of the lateral ventricle and forms a major cerebrospinal fluid (CSF)–containing cavity within the cerebral hemispheres. It plays an essential role in CSF circulation and lies in close relation to critical white matter tracts and deep gray matter structures.

It is a key anatomical region in neuroimaging, commonly assessed in hydrocephalus, developmental anomalies, tumors, hemorrhage, and neurodegenerative disorders.

Synonyms

  • Central part of the lateral ventricle

  • Ventricular body

Location

  • Situated within the cerebral hemisphere

  • Extends from the interventricular foramen (of Monro) anteriorly to the atrium (trigone) posteriorly

  • Located superior to the thalamus

  • Inferior to the corpus callosum

  • Medial to the body of the caudate nucleus

  • Lateral to the septum pellucidum

Boundaries and relations

Roof:

  • Body of the corpus callosum

Floor:

  • Body of the caudate nucleus (lateral part)

  • Thalamus (medial part)

Medial wall:

  • Septum pellucidum

Lateral wall:

  • Body of the caudate nucleus

Anteriorly:

  • Interventricular foramen (foramen of Monro)

Posteriorly:

  • Atrium (trigone) of the lateral ventricle

Contents

  • Cerebrospinal fluid (CSF)

  • Choroid plexus:

    • Present along the medial floor

    • Continues posteriorly into the atrium

Function

  • CSF circulation: Facilitates flow of CSF from lateral ventricles to the third ventricle via the foramen of Monro

  • CSF production: Houses choroid plexus contributing to CSF secretion

  • Cerebral protection: Acts as a cushioning system for surrounding brain tissue

  • Pressure regulation: Helps maintain intracranial pressure equilibrium

Clinical significance

  • Hydrocephalus: Dilatation of the ventricular body in obstructive or communicating hydrocephalus

  • Intraventricular hemorrhage: Common site for blood accumulation

  • Tumors: Intraventricular tumors (e.g., ependymoma, central neurocytoma) may arise here

  • Developmental anomalies: Abnormal morphology in agenesis of corpus callosum

  • Neurodegeneration: Ventricular enlargement seen in cerebral atrophy

  • Shunt placement: Frequent target for ventricular catheter insertion

MRI appearance

T1-weighted images:

  • CSF: Low signal intensity

  • Choroid plexus: Isointense to slightly hyperintense

  • Surrounding white matter: Intermediate signal

T2-weighted images:

  • CSF: High signal intensity

  • Normal ventricular margins: Smooth and well-defined

FLAIR:

  • CSF: Suppressed (dark signal)

  • Normal: No periventricular hyperintensity

Diffusion-weighted imaging (DWI):

  • CSF: No diffusion restriction (dark)

Post-contrast T1-weighted images:

  • CSF: No enhancement

  • Choroid plexus: Normal physiological enhancement

CT appearance

Non-contrast CT:

  • CSF: Hypodense (dark) relative to brain parenchyma

  • Hemorrhage: Hyperdense blood layering within the ventricle

Post-contrast CT:

  • CSF: No enhancement

  • Choroid plexus: Enhances normally

MRI images

MRI Body of lateral ventricle AXIAL anatomy image -img-00000-00000

MRI images

MRI Body of lateral ventricle sag anatomy image -img-00000-00000

CT image

CT Body of lateral ventricle sag anatomy image -img-00000-00000