Vocabulary Quiz 8 Flashcards
Projections of the arachnoid mater that protrude into the superior sagittal sinus and through which cerebrospinal fluid is reabsorbed back into the bloodstream
Arachnoid Villi
A barrier consisting of specialized brain capillaries and astrocytes that prevents the passage of materials from the blood to the cerebrospinal fluid and brain
Blood-Brain Barrier
The motor area of the brain in the frontal lobe that translates thoughts into speech
Broca’s Area
The part of the brain lying posterior to the medulla oblongata and pons; governs balance and coordinates skilled movements
Cerebellum
The surface of the cerebral hemispheres, 2-4 mm thick, consistinf of gray matter; arranged in six layers of neuronal cell bodies in most areas
Cerebral Cortex
Second of three basic regions of each cerebral hemisphere; responsible for communication between cerebral areas and between cerebral cortex and lower CNS centers; consists mainly of myelinated fibers bundled into large tracts
Cerebral White Matter
A fluid produced by ependymal cells that cover choroid plexuses in the ventricles of the brain; the fluid circulates in the ventricles, the central canal, and the subarachnoid space around the brain and spinal cord
Cerebrospinal Fluid
A network of capillaries located in the roof of each of the four ventricles of the brain; ependymal cells around choroid plexuses produce cerebrospinal fluid
Choroid Plexus
The great commisure of the brain between the cerebral hemispheres
Corpus Callosum
Crossing of 90% of the axons in the large motor tracts to opposite sides in the medullary pyramids
Decussation of Pyramids
Largest and longest lobe in each hemisphere. Located in the upper forward half. Association areas are involved with planning, problem-solving, personality, decision making, controlling emotions and speech production
Frontal Lobe
A portion of the diencephalon, lying beneath the thalamus and forming the floor and part of the wall of the third ventricle
Hypothalamus
A triangular area of the cerebral cortex that lies deep within the lateral cerebral fissure, under the parietal, frontal, and temporal lobes
Insula
Joins the right and left sides of the thalamus
Intermediate Mass
The most inferior part of the brain stem
Medulla Oblongata
An area at the back of each cerebral hemisphere that is the primary receiving area for visual information
Occipital Lobe
Portion posterior to the frontal lobe, responsible for sensations such as pain, temperature, and touch
Parietal Lobe
The part of the brainstem that forms a “bridge” between the medulla oblongata and the midbrain, anterior to the cerebellum
Pons
A network of small groups of neuronal cell bodies scattered among bundles of axons (mixed gray and white matter) beginning in the medulla oblongata and extending superiorly through the central part of the brain stem
Reticular Formation
An area on each hemisphere of the cerebral cortex near the temples that is the primary receiving area for auditory information
Temporal Lobe
A large, oval, structure located bilaterally on either side of the third ventricle, consisting of two masses of gray matter organized into nuclei; main relay center for sensory impulses ascending to the cerebral cortex
Two egg-shaped masses of gray matter, main relay center between the brain stem and the cerebrum, and registers conscious recognition of pain and temperature, and is concerned with certain emotions
Thalamus
Collection of cell bodies in the medulla oblongata of the brain that regulates or modulates blood pressure and cardiac function
Vasomotor Center
A cavity in the brain filled with cerebrospinal fluid. An inferior chamber of the heart
Ventricle
