Sheep Brain Dissection

Cerebrum

Large, deeply wrinkled region of the brain responsible for conscious experience including perception, emotion, thought, and planning (#1)

Cerebellum

Controls movement, balance, and muscle coordination (#2)

Spinal cord

Bundle of nerve fibers inside the spine that connects the brain to the sensory and motor parts of the body (#3)

Frontal lobe

Controls cognitive processes such as planning and the inhibition of drives (#4)

Parietal lobe

Integrates sensory information and functions in spatial perception (#5)

Temporal lobe

Functions in auditory perception and long-term memory (#6)

Occipital lobe

Receives sensory information from the eyes (#7)

Left hemisphere

The left side of the cerebrum (#8)

longitudinal fissure

Deep groove that separates the right and left hemispheres (#9)

Right hemisphere

The right side of the cerebrum (#10)

Brain stem

Route of information transfer between the forebrain and spinal cord; consists of the medulla, pons, and midbrain (#11)

Medulla oblongata

Brain region that connects to the spinal cord; important in autonomic functions (#12)

Pons

Connection between forebrain, cerebellum, and medulla; important in regulation of sleep and breathing (#13)

Optic chiasm

Junction at which some fibers from easch optic nerve crisscross, enabling effective binocular vision (#15)

Optic nerve

Connects the retina to the optic chiasm (#16)

Olfactory bulb

Involved in detection and discrimination of odors (#17)

Sulci

Furrows in the folds of the cerebrum (#19)

Gyri

Bulges in the folds of the cerebrum (#20)

Arbor vitae

Branching white matter in the cerebellum(#25)

Pineal gland

Endocrine gland that secrets melatonin, which influences circadian rhythms and timing of sexual development (#29)

Thalamus

Region between midbrain and cerebral cortex; receives many types of sensory signals and relays them to the cerebral cortex (#30)

Corpus callosum

Bundle of nerve fibers connecting right and left cerebral hemispheres (#31)

Hypothalamus

Brain structure with many functions including hormone secretion, temperature regulation, and hunger, mood, thirst, and fatigue (#32)

White matter

Portions of the central nervous system made up mainly of myelinated nerve fibers; in the cerebrum, usually surrounded by gray matter (#33)

Gray matter

Portions of the central nervous system made up mainly of nerve cell bodies (#34)

Meninges

dura mater, arachnoid mater, pia mater

lateral ventricle

one of the ventricles located inside the corpus callosum

transverse fissure

separates cerebrum and cerebellum

central sulcus

separates frontal and parietal lobes

precentral gyrus

the strip of frontal cortex, just in front of the central sulcus, that is crucial for motor control

postcentral gyrus

the strip of parietal cortex, just behind the central sulcus, that receives somatosensory information from the entire body

pituitary gland

endocrine gland at the base of the brain

Pia Mater

thin, delicate inner membrane of the meninges

oculomotor nerve

eye movement