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OSSF Exam 3: The Brain and Autonomic Nervous System Test Complete Questions And Answers
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OSSF Exam 3: The Brain and Autonomic Nervous System Test Complete Questions And Answers
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OSSF Exam 3: The Brain and AutonomicNervous System Test Complete
Questions And Answers
Parts of the Brain Stem (3 parts) CORRECT ANSWERS medulla oblongata
pons
mesencephalon (midbrain)
Mesencephalon (midbrain) (dorsal portion of midbrain......the ventral portion of
midbrain...) CORRECT ANSWERS dorsal portion of the midbrain that contains the
tectum (roof) which contains the bilateral rostral and caudal colliculi
The ventral portion of the midbrain is referred to as the tegmentum. Nuclei within the
tegmentum are critical for the control of voluntary movement and motivated behavior
Rostal Colliculi of Mesencephalon (receives visual...) CORRECT ANSWERS receives
visual information and plays a role in the control of eye movement, particularly during
visual tracking
Caudal Colliculi of Mesencephalon (receives acoustic...) CORRECT ANSWERS
receives acoustic information and coordinates reflexes to turn the head towards
unfamiliar or unexpected sounds (auditory stimulus)
What does the medulla oblongata regulate? (regulate many vital...) CORRECT
ANSWERS regulates many vital biological functions, including heart rate, respiration,
gastrointestinal functions, salvation, coughing, and sneezing
Together with the Pons, the medulla oblongata.... (is an important....) CORRECT
ANSWERS is an imporatant realy site for auditory and vestibular information, gustatory
sensations and associated motor reactions, and information about various visceral
states
The central portion of the pons and medulla oblongata..... (contains the reticular..)
CORRECT ANSWERS contains the reticular formation, a network interconnected
neruons associated with wakefulness and generalized sensory aurosal. the reticular
formation exends through the midbrain as well
The pons and medullar, along with cerebellum are often refered to as the? CORRECT
ANSWERS Hindbrain
, CORRECT ANSWERS cell bodies for many of the autonomic nervous system are
found in the pons and the medulla
Cranial Nerves (how many nerves...in forebrain?...in the midbrain?....from pons and
medualla?....what about the vagus (x)?) CORRECT ANSWERS Twelve Paris of cranial
nerves
two in for forebrain ( I and II) --) do not emerge from the brain stem!
two from the midbrain (III and IV) (ocular motor and trochlear nerve)
eight from the pons and medulla ( a few cranial nerves have autonomic functions as
well!)
only the vagus (X) innervates structures outside the head and neck (widely distributed
to the thorax and abdomen)
What system gives sensory system, providing information about motion, head position,
and spatial orientation? Located in? Is it always active? CORRECT ANSWERS
vestibular system --) located in the inner ear!. Always active!
Vestibular System and Control of Eye Movement (vestibulo-occu;ar reflex is
the....vestibulo-oculor reflex involves....) CORRECT ANSWERS The vestibulo-ocular
reflex is the involuntary movement of the eyes in response to displacement of the head.
This reflex allows retinal images to remain stable while the head is moved. --) cranial
nerves 3 and 6 allows for this!
•Vestibulo-ocular reflex involves input from the vestibular system and coordinated
activity of Cranial Nerves III and VI to move the eyes in the opposite direction of the
head movement (head turns right - eyes move left; gaze remains fixed).
Eye movments are controlled by.... CORRECT ANSWERS the oculomotor (III),
trochlear (IV) and abducens nerves (VI)
Posture it maitained by 3 important what? They work together to do what? CORRECT
ANSWERS 3 important brain-stem reflexes
they work together to stabilize the position of the head and keep the body upright
Balance and Posture: the three brain stem reflexes involved? The efferent arc of these
reflexes....what are they all coordinated with? CORRECT ANSWERS Vestibular Reflex
Tonic Neck Reflex
Righting Reflex
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