Chp 13 Cerebrum Flashcards
What are convolutions of the cerebrum separated by sulci?
Gyri (pg. 78)
What is the largest part of the brain forming 2 hemispheres?
the cerebrum (pg. 78)
The cerebrum contains various large what?
fissures & large sulci (pg. 78)
What is one of the 4 major fissures that separate the right and left hemispheres and is occupied by the falx cerebri?
The longitudinal fissure (pg. 78)
Out of the 4 fissures which one separates the cerebrum and cerebellum and is occupied by the tentorium cerebelli?
The transverse fissure or sulcus (pg. 78)
Which of the 4 major fissures separates the temporal lobe from the rest of the cerebrum superior to it?
The lateral fissure or sulcus (pg. 78)
Which of the 4 major fissure/sulcus separates the pre-central (motor) and post-central (sensory) gyri?
The central sulcus (pg. 78)
What are the 4 main lobes of the cerbrum?
Frontal Parietal Occipital Temporal (pg. 78)
What is the 5th lobe of the cerebrum that lies within the depths of the lateral sulcus?
The insula (pg. 78)
What is the primary motor cortex of the cerebrum?
The pre-central gyrus (pg. 79)
Where is the pre-central gyrus located?
anterior to the central sulcus (pg. 79)
What is the primary sensory cortex?
the postcentral gyrus (pg. 79)
Where does the postcentral gyrus lie?
posterior to the central sulcus (pg. 79)
What constitutes the central gray matter of the cerebrum?
The basal ganglia (nuclei) (pg. 79)
What does the basal ganglia do?
They control movement and posture. This is where diseases such as Parkinson’s and Huntington’s chorea cause disturbances in voluntary muscular control. (pg. 79)
What is the most important sensory relay center of the brain that sends incoming impulses from the receptors of the body to the cerebral cortex?
The Thalamus (pg. 79)
What structure lies between and is associated with the optic chiasma, mammillary bodies, and pituitary gland?
The hypothalmus (pg. 79)
Where do optic nerves (CN II) cross?
Optic chiasma (pg. 79)
What is the sensory synaptic station that is part of the limbic system?
Mammillary bodies (pg. 79)
What projects inferior to the hypothalamus and secretes many horomones?
Pituitary gland (pg. 79)
What are the functions of the Hypothalamus in the regulation of visceral activity?
- Body Temp
- Carbohydrate and lipid metabolism
- Sleep, sexual activity, and emotion (pg. 79)
What makes up the brain stem from superior to inferior?
Midbrain
pons
medulla oblongata (pg. 79)
What are the four elevations that are arranged as two pairs located at the roof (dorsal surface) of the midbrain called?
The corpora quadrigemina (pg. 80)
What is the pair of elevations of the corpora quadrigemina that are involved in the pathway of vision?
Superior colliculi (pg. 80)
What is the pair of elevations of the corpora quadrigemina that are involved in the pathway of hearing?
Inferior colliculi (pg. 80)
What acts as a bridge connecting the right and left cerebellar hemispheres and relays impulses from the cerebral cortex to the cerebellum?
The pons (pg. 80)
What is the part of the brain that is directly continuous with the spinal cord and contains most of the ascending and descending tracts of the spinal cord?
The medulla oblongata (pg. 80)
The medulla oblongata represents an area in which tract fibers lie called what?
Pyramids (pg. 81)
An area inferior to to the pyramids is where the pyramidal tracts cross over to the contralateral side called what?
Pyramidal decussation (pg. 81)
Other tract fibers can cross where?
in the spinal cord or in the brain itself (pg. 81)
The medulla oblongata contains several nuclei involved in the regulation of vital body activities such as?
Respiratory
Cardiac (heart rate)
Vasomotor (blood pressure) (pg. 81)
This structure connects with the midbrain, pons, and medulla oblongata via the superior, middle, and inferior cerebellar peduncles? 2 names?
Cerebellum (little brain) (pg. 81)
The cerebellum consists of 2 hemispheres separated by what?
a median vermis (pg. 81)
The outer layers of the cerebellum contain what?
Folia (seperated by fissures)
(folia= leaves) pg. 81
Internally the cerebellum has white matter branching in the form of a tree called what?
The arbor vitae (pg. 81)
What are the functions of the cerebellum?
- coordination of muscular activity
- regulation of muscle tone
- maintenance of equilibrium (pg. 81)