Parts, Boundaries, and Features of the Third, Fourth, and Lateral Ventricles

Boundaries and Anatomical Relations of the Lateral Ventricles

The lateral ventricles are crucial components of the brain’s ventricular system, playing a vital role in cerebrospinal fluid circulation. They are symmetrically located within the cerebral hemispheres and comprise several parts, including the anterior horn, body, posterior horn, and inferior horn.

Boundaries of the Lateral Ventricles

• Superior Boundary: Formed by the corpus callosum.
• Medial Boundary: The septum pellucidum separates the lateral ventricles.
• Inferior Boundary: The thalamus and caudate nucleus contribute to the ventricle’s floor.
• Anterior Boundary: Includes the head of the caudate nucleus and the anterior limb of the internal capsule.
• Posterior Boundary: Extends into the occipital lobe and is defined by the forceps major.

Anatomical Relations

The lateral ventricles maintain crucial anatomical relationships with several important structures:

• Connected to the third ventricle via the interventricular foramen (Foramen of Monro).
• Surrounded by the cerebral cortex, deep nuclei, and white matter tracts.
• Involved in cerebrospinal fluid dynamics essential for brain homeostasis.