Central Nervous System Flashcards
What protects the brain?
Cranial meninges
What is included in the brainstem?
Medulla, pons, midbrain
_ allows shock absorption and circulation of nutrients.
Cerebrospinal fluid
_ allows coordination of muscular movements and balance.
Cerebellum
_ allows muscular movements, emotions, and intelligence.
Cerebrum
_ controls temperature and pain recognition, homeostasis, thirst center, and sleep patterns.
Diencephalon
_ allow consciousness, heartbeat, breathing, visual and auditory responses.
Brainstem
How much does the brain weigh?
3 lbs
Largest and most complex mass of nervous tissue in the body.
Brain
Organizing and processing center of the nervous system.
Brain
What are the four main part of the brain?
Cerebrum/cerebral hemisphere, diencephalon, brainstem, cerebellum
Part of the brain responsible for intellectual process and emotions.
Cerebrum
Part of the brain responsible for homeostasis.
Diencephalon
Part of the brain responsible for breathing, heartrate, reaction to visual and auditory stimulation.
Brainstem
Part of the brain responsible for body posture and balance.
Cerebellum
Most superior of the brain.
Cerebrum
Makes up the bulk of the brain which is described to be larger than the 3 brain regions combined.
Cerebrum
Have nerve centers for sensory & motor activities.
Cerebrum
What composes the surface area of the cerebrum?
Gray matter referred to as cerebral cortex
Controls speech, memory, logical & emotional responses as well as consciousness, interpretation of sensation & voluntary movement.
Cerebral cortex
3 basic regions of cerebrum
Cortex, internal white matter, and basal nuclei
Largest portion of the brain.
Cerebrum
2 divisions of the cerebrum
Right hemisphere and left hemisphere
The right and left hemisphere is separated by a?
Longitudinal fissure
4 lobes of the cerebrum
Frontal, parietal, occipital, and temporal
Part of the cerebrum that controls the right side of the body.
Left hemisphere
Hemisphere responsible for math, analytic, and speech.
Left
Hemisphere that controls the left side of the body.
Right
Hemisphere responsible for music, art, and abstract ideas
Right
Connection between 2 hemispheres.
Corpus callosum
Elevated ridges/convolutions on the surface of each hemisphere.
Gyrus/gyri
Grooves that separate each gyri.
Sulcus/sulci
Deep grooves
Fissure
Deep bridge of nerve fibers that connects the 2 cerebral hemisphere.
Corpus callosum
Alternate name for the central sulcus.
Sulcus of Rolando
Forms the boundary between the frontal and the parietal lobes on the lateral and medial surfaces of the cerebral hemispheres.
Central sulcus
A deep fissure that is first identified on the inferior surface of the brain close to the anterior perforated substance but becomes most visible on the lateral surface.
Lateral sulcus
Separates the frontal and parietal lobes from the temporal lobe.
Lateral sulcus
Primary motor area
Frontal lobe
Forms anterior portion of each hemisphere.
Frontal lobe
Controls voluntary muscular functions (allows us to consciously move our skeletal muscles).
Frontal lobe
Controls mood, aggression, reasoning, thought & motivation
Frontal lobe
Major voluntary motor tract
Corticospinal/pyramidal tract
Most of the neurons in the primary motor area control body areas having fast motor control, including?
Face, mouth, and hands
Aside from neurons that control body areas having fast motor control, what other cells are present in the frontal lobe?
Large pyramidal-shaped cells
Impulses cross over from one side of the brain to the other at the _ to stimulate the opposite side of the body.
Corticospinal tract
Primary somatic sensory area
Parietal lobe
Located behind the frontal lobe, separated by central sulcus.
Parietal lobe
Control center for evaluating sensory information of touch, pain, balance, taste and temperature (coldness).
Parietal lobe
Impulse travelling from body’s sensory receptors (except for special senses) are localized & interpreted in this area.
Parietal lobe
Body regions with most sensory receptors.
Lips and fingertips
Lobe that is considered as the auditory area.
Temporal lobe
Located beneath the frontal & parietal lobes separated by lateral fissure.
Temporal lobe
Evaluates hearing input & smell as well as being involved with memory processes.
Temporal lobe
In what aspects is the temporal lobe involved?
Hearing, smell, and memory processes
Parietal lobe is the control center for evaluating sensory information of? (5)
Touch, pain, balance, taste and temperature (coldness)