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B313E4 Brain structures and cranial nerves
Terms in this set (21)
Contents: 60% fat (very susceptible to damage due to toxins)
Weight: 3 lbs
Male size: 10% bigger than female, but size does not indicate intellect.
General brain information? (contents, weight, size in female vs male)
Functions in conscious thought, memory, and learning.
Has gyri and sulci, a longitudinal fissure, lateral sulcus, and transverse fissure.
The cerebrum (telencephalon)
This is the primary somatic motor cortex and functions as the conscious control of skeletal muscle.
The prefrontal cortex is involved in intellect, complex learning, judgement, long-term planning, and personality.
These factors are highly affected by lobotomies (no longer performed).
Frontal Lobe of the Cerebrum:
This is the primary somatic sensory cortex and functions as the conscious perception of touch, pressure, pain, temperature, etc.
Parietal Lobe of the cerebrum
This is the primary visual cortex and functions as the conscious perception
Occipital lobe of the cerebrum
This is the primary auditory/olfactory cortex that consciously perceives sound and smell.
Temporal lobe of the cerebrum
arcuate fibers-- lobe to lobe
commissural-- hemisphere to hemisphere
These fibers allow neurons to send messages to other lobes, brain regions, and the spinal cord. MAINLY WHITE MATTER
What types of fibers make up the internal capsule?
folded into sulci and gyri; mainly neuron cell bodies (GREY MATTER).
This is where motor function starts!!
Cerebral Cortex characteristics:
it functions in large, subconscious movements in skeletal muscle. (rhythm of body, gait, tone
MAINLY GREY MATTER
Cerebral Nuclei (basal ganglia) characteristics:
functions as a sensory "relay station" to cerebral cortex
functions as the main control center of the autonomic nervous system and endocrine system
center for emotions--fear, sex drive, and rage
responsible for the sleep wake cycle
ascending and desending fibers pass through here
"little feet of the cerebrum)"
cerebral penducles (mesencephalon)
where visual and auditory reflexes happen
RIGHT BENEATH THE TAIL OF THE LATERAL VENTRICLES
corpora quadrigemina (mesencephalon)
Receives information from the cerebrum, inner ear, and body.
Functions to smooth and coordinate body movements AND maintain posture and EQUILIBRIUM
links the cerebellum to the brainstem and spinal cord
contains the centers for respiratory rhythm
pons "bridge" (metencephalon)
it is continuous with the spinal cord and contains the centers for autonomic functions (heart beat, BP, swallowing, vomiting
medulla oblongata (myelencephalon)
CRANIAL NERVES (NAMED)
Which cranial nerves have sensory, motor, or both function?
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