Neuroanatomy: Ventricles, Clinical Conditions, and Diagnostics

Vocabulary practice flashcards covering anatomical terminology, ventricular dimensions, neurological symptoms, and diagnostic concepts discussed in the lecture.

Syringiomyelia

A fluid-filled cyst located within the spinal cord.

Posterior cranial fossa

The cranial cavity space located in the region of the occipital bone.

Shunt

A medical device or passage that routes fluid from one area of the body to another.

Ventriculoperitoneal shunt

An internal tube inserted into the skull to drain excess cerebrospinal fluid from the brain into the abdominal cavity, often used to manage chronic hydrocephalus.

Spinal tap

A diagnostic procedure performed to examine cerebrospinal fluid, commonly used when investigating meningitis or an unidentified source of infection causing high fever.

Evans index

A diagnostic ratio comparing the width of the frontal horns of the lateral ventricles to the internal diameter of the skull, where a ratio of $0.3$ or higher indicates ventricular enlargement.

CN (Cranial Nerve)

An abbreviation for cranial nerve, referring to one of the $12$ pairs of nerves emerging directly from the brain or brainstem.

Palsy

A condition characterized by paralysis, weakness, or impairment of nerve function.

Lateral ventricles

Paired C-shaped structures located in each cerebral hemisphere, measuring approximately $10\,\text{mm}$ in size and consisting of an anterior horn, body, posterior horn, and inferior horn.

Hydrocephalus

A condition involving an abnormal accumulation of cerebrospinal fluid (CSF) within the ventricles of the brain.

Brain herniation

A protrusion or displacement of brain tissue out of its normal anatomical position, commonly resulting from injury or pressure.

Third ventricle

A narrow medial brain cavity typically measuring between $3.6\,\text{mm}$ and $6.2\,\text{mm}$ that connects to the fourth ventricle.

Cerebral aqueduct

A narrow channel or tunnel that allows cerebrospinal fluid to travel from the third ventricle into the fourth ventricle.

Ventriculitis

Inflammation or swelling of the brain's ventricular system.

Meningitis

Inflammation or swelling of the meninges, the protective membranes surrounding the brain and spinal cord.

Fourth ventricle

The lowest ventricle of the brain, measuring between $8.7\,\text{mm}$ and $16.1\,\text{mm}$, which drains cerebrospinal fluid into the spinal cord and subarachnoid space.

Diplopia

Double vision, which may occur when structural blockage or pressure affects the occipital lobe or nearby cranial nerves.

Nystagmus

Involuntary, repetitive movement of the eyes.

Dysarthria

Weakness or motor dysfunction in the muscles used for speech production.

Limbic system

A complex network of brain structures that includes the amygdala, hippocampus, thalamus, and hypothalamus.