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Brain Organization
Neurobiology
42
Other
Undergraduate 3
01/25/2009

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Term
Gyrus
Definition
Folds on surface of brain
Term
Sulcus
Definition
Grooves on brain's surface
Term
Right Hemisphere
Definition
Involved in spatial reasoning/parallel processing.
Term
Left Hemisphere
Definition
Involved in logical reasoning and controls language in most humans.
Term
Frontal Lobes
Definition
Process conscious control of movement, behavior and personality.
Term
Parietal lobes
Definition
Process sensory information from muscle and skin.
Term
Temporal lobes
Definition
Involved in processing of hearing and language.
Term
Occipital lobe
Definition
Involved in vision
Term
Lateral Sulcus
Definition
Separates the temporal lobe from the frontal lobe.
Term
Central Sulcus
Definition
Separates frontal lobe from parietal lobe
Term
Post Central Gyrus
Definition
Processes touch and other skin sensations. Part of parietal cortex.
Term
Pre-central gyrus
Definition
Region of motor control, part of the frontal cortex.
Term
Sagittal fissure
Definition
Separates right and left hemisphere of the brain.
Term
Dorsal Root
Definition
Contains axons bringing information into the spinal cord
Term
Ventral Root
Definition
Contains axons carrying information out of the spinal cord
Term
Dorsal Root Ganglia
Definition
The soma lies outside the spinal cord in these clusters. There's one for each spinal nerve.
Term
Afferent Axon
Definition
Axons which are transporting information toward a target.
Term
Efferent Axon
Definition
An axon which transports information away from a target.
Term
Meninges
Definition
Collection of 3 specialized membranes separating the brain from the skull.
Term
Dura Mater
Definition
Outermost covering of the meninges. leather-like consistency, forms tough inelastic "bag".
Term
Arachnoid membrane
Definition
Middle layer of meninges. Spider web-like structure. Allows passage of blood vessels and connects Pia mater with Dura mater.
Term
Pia mater
Definition
Thin membrane with many blood vessels. Separated from arachnoid by space filled with cerebrospinal fluid.
Term
Ventricular System
Definition
Fluid-filled caverns and canals inside the brain.
Term
Choroid Plexus
Definition
Produces cerebrospinal fluid. Found in ventricles of cerebral hemispheres.
Term
Arachnoid villi
Definition
Special structures which allow blood vessels to absorb cerebrospinal fluid.
Term
Three types of cortex in Mammals
Definition
Olfactory cortex, hippocampus and neocortex (only in mammals)
Term
Midbrain derived from
Definition
Mesencephalon
Term
Pons derived from
Definition
metencephalon with the cerebellum
Term
Medulla Oblongata derived from
Definition
Myencephalon
Term
Midbrain
Definition
Functions in visual and auditory orientation reflexes, maintaining posture and voluntary movements of body and face, pain.
Term
Midbrain cranial nerves
Definition
3-oculomotor; 4-tochlear; 6-abducens
Term
Pons
Definition
Regulates respiration, motor and sensory fibers run through it, movement of face&jaw muscles, eyemovement & sensation to face, sleep.
Term
Pons cranial nerves
Definition
5-trigem; 7-facial
Term
Medulla Oblongata
Definition
Thoroughface for somatic afferent & efferent fibers. Caudal portion of brainstem, leads to spinal cord.
Term
Medulla Oblongata cranial nerves
Definition
CN 7-12
Term
Basal Ganglia
Definition
Involved in voluntary beginning and ending of movement: lesions cause Parkinson's disease.
Term
4th Ventricle
Definition
Separates cerebellum from brain stem.
Term
Basal Ganglia-Striatum
Definition
3 forebrain nuclei involved in motor control
Term
Diencephalon
Definition
Processing sensory and motor information & endocrine role. Consists of thalamus and hypothalamus
Term
Limbic System
Definition
Involved in regulating emotion, motivation and homeostasis.
Term
Thalamus
Definition
Processes sensory info & relays motor info
Term
Hypothalamus
Definition
Part of limbic system, controls pituitary.
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