Chapter 14 Review Questions Flashcards
name the 6 major regions of the brain
cerebrum
cerebellum
diencephalon
midbrain
pons
medulla oblongata
what brain regions make up the brain stem?
midbrain
pons
medulla oblongata
Which primary brain vesicle is destined to form the cerebellum, pons, and medulla oblongata?
rhombencephalon
from superficial to deep, name the layers that make up the cranial meninges
dura mater (2 layers)
arachnoid mater
pia mater
what would happen if the normal circulation or reabsorption of CSF were blocked?
CSF would continue to be produced at the choroid plexus in each ventricle, but the fluid would accumulate there, causing the ventricles to swell. a condition known as hydrocephalus
how would decreased diffusion across the arachnoid granulations affect the volume of CSF in the ventricles?
less CSF would reenter the bloodstream, and CSF would accumulate in the ventricles. This increased pressure in the ventricles could damage the brain
many water soluble molecules that are abundant in the blood occur in small amounts or not at all in the extracellular fluid of the brain.
Why?
the BBB regulates the movement of such molecules from the blood to the extracellular fluid of the brain
the medulla oblongata is one of the smallest sections of the brain, yet damage there can cause death, whereas similar damage in the cerebrum might go unnoticed.
why?
damage to the medulla oblongata can be lethal because it contains many vital autonomic reflex centers including those that control breathing and regulate heart rate and blood pressure
name the main components of the diencephalon
epithalamus
thalamus
hypothalamus
damage to the lateral geniculate nuclei would interfere with the functions of which special sense?
sense of sight
which component of the diencephalon is stimulated by changes in body temperature?
hypothalamus – preoptic area communicates with vasomotor center
What are the primary functions of the limbic system?
processing memories, creating emotional states, drives, and associated behaviors
Damage to the amygdaloid body would interfere with regulation of what division of the ANS?
sympathetic – fight or flight
what is the name of the fibers carrying information between the brain and spinal cord, and through which brain regions would they pass?
projection fibers. pass through the diencephalon, brain stem ,and cerebellum
what symptoms would you expect to observe in a person who has damaged basal nuclei?
decreased muscle tone and the loss of coordination of learned movement patterns
a patient suffers a head injury that damages her primary motor cortex. where is this area located?
in the precentral gyrus of the frontal lobe of the cerebrum
which senses would be affected by damage to the temporal lobe of the cerebrum?
smell (olfactory) and auditory (sound) impulses
after suffering a stroke, a patient is unable to speak.
he can understand what is said to him, and he can understand written messages, but he cannot express himself verbally. which part of his brain has been affected by the stroke
the stroke has damaged the speech center, located in the frontal lobe
a patient is having a difficult time remembering facts and recalling long term memories. which part of his cerebrum is probably involved?
the temporal lobe, specifically the hippocampus and amygdaloid body.
his problem may also involve other parts of the limbic system
the term “higher brain centers” refers to those areas of the brain involved in higher order functions. these centers would probably include nuclei, centers, and cortical areas of………
the cerebrum, cerebellum, and diencephalon