Cerebrum and Eye Anatomy Study Guide

This study guide contains vocabulary flashcards covering major topics related to the cerebrum, cranial nerves, and eye anatomy for exam preparation.

Cerebrum

The largest part of the brain, responsible for higher brain functions such as thought, action, and emotion.

Cerebral cortex

The outer gray matter layer of the cerebrum involved in various brain functions including sensation and movement.

Gyri

Raised folds on the surface of the cerebral cortex.

Sulci

Shallow grooves on the surface of the cerebral cortex that separate gyro.

Fissures

Deep grooves that divide the brain into lobes.

Longitudinal fissure

The deep groove that separates the left and right hemispheres of the cerebrum.

Central sulcus

The groove that separates the frontal lobe from the parietal lobe.

Precentral gyrus

Also known as the primary motor area, it is responsible for voluntary motor functions.

Postcentral gyrus

Also known as the primary somatosensory area, it is responsible for processing sensory information.

General somatic senses

Senses like touch, pain, temperature that provide information about the body.

Special senses

Distinct senses such as vision, hearing, taste, olfaction, and balance.

Frontal lobe

The lobe of the brain associated with reasoning, planning, and movement.

Parietal lobe

The lobe that processes sensory information and spatial awareness.

Occipital lobe

The lobe that is primarily responsible for vision.

Temporal lobe

The lobe associated with memory and auditory processing.

Parieto-occipital sulcus

The groove that separates the parietal and occipital lobes.

Lateral cerebral sulcus

The groove that separates the temporal lobe from the frontal and parietal lobes.

Transverse fissure

The groove that separates the cerebrum from the cerebellum.

Tracts

Bundles of nerve fibers in the central nervous system.

Association tracts

Tracts that connect different parts of the same hemisphere.

Commissural tracts

Tracts that connect the two hemispheres of the brain.

Projection tracts

Tracts that connect the cerebrum with lower brain regions and the spinal cord.

Somatosensory homunculus

A representation of the body based on sensory feedback.

Motor homunculus

A representation of the body based on motor function control.

Cranial nerves

Twelve pairs of nerves that arise directly from the brain.

Palpebral fissure

The opening between the eyelids.

Conjunctiva

A thin membrane that lubricates the eye.

Iris

The colored part of the eye that regulates light entry.

Pupil

The opening in the center of the iris that controls the amount of light that enters the eye.

Lacrimal apparatus

Structures involved in tear production and drainage.

Sclera

The white protective outer coat of the eye.

Corneal sodium pump

A mechanism that maintains the transparency of the cornea.

Choroid

The layer of blood vessels between the sclera and retina that nourishes the eye.

Macula lutea

An area on the retina responsible for sharp central vision.

Fovea centralis

The small pit in the retina that provides the clearest vision.

Aqueous humor

The clear fluid in the front chamber of the eye, involved in maintaining intraocular pressure.

Vitreous humor

The gel-like substance that fills the space between the lens and retina.

Rods

Photoreceptors in the retina responsible for low-light vision.

Cones

Photoreceptors in the retina that are responsible for color vision and visual acuity.

Signal transduction pathway

The process by which a light signal is converted into an electrical signal in the retina.

Neurotransmitter release

Chemical signaling involved in the transmission of visual information.