brain stem and the cerebellum Flashcards
the brain stem is loacted
between teh cerebrum and the sc
the brain stem consists of the
midbrain , pons ,medulla oblongata
fucntion of the brain stem
produces autonomic behaviour necessary for surivival
provides a pathway for tracts running to and from the brain
mid brain located between
diencepholon and thepons
the mid brain is connected to the cerebellum because of the
superior cerebellar peduncles
what cranial nerves exit teh midbrain
3,4
the nuclei present in the midbrain are the
red nucleud and substania n on each side
the red nuckleus contains
numerous blood vessles
teh substantia n secretes
dopamine
loss of these neurons is associated iwth parkinsons disease
the midbrain dunctions as a
relay system
location of teh pons
between teh midbrain and teh medulla oblongata
it contains sensory and motor nucelei for 4 cranial nervs
5,6,7, and soem bramches of 8
the pons is connected tp the cerebellum because iof the
middle cerebellar peduncles
what nucelus does te pons have
respirator nucelus
help control breathing to maiintain respiratory rhythm
what part of teh brainstem is the most inferior region of the brain?
medulla oblongata
the medulla oblongata becomes teh spinal cord at the level of the
firamen magnum
2 medullary pyramids are visbile only
ventrally
the cranial nerves taht exit the medulla oblongata are the
rest of 8 ,9,10,11,12
what connects teh medulla oblongata tothe cerebellum
inferiro cerebellar peduncle
the appearnce of teh cerebullum superiorly and inferiorly
butterfly
what connects teh two lateral cerbellar hemispheres
the vermis
the cerebellar hemispheres
andteriro and posterior lobe and flocculonodular lobe
cerebellar cortex consists of
grey matter in parallel folds callled the folia
inner white matter of the cerebellum is aclled the
arbor vitae
the cerebellum contains how many nuclei
3
the cerebellum connect to what through teh superior cerbellar peduncle
midbraina dn it contains mostly moto axons
the cerebullum connects to what through the middle cerebellar peduncle
pons and contains sensory fibers
the cerebellum connects to what throught the inferior cerebellar peduncle
medulla oblongata and the spinal cord and ocntains sensory and motor axons
function of teh cerebellum
the coordination of skeletal muscle contraction
may have a role in cognition and language processing
regulating posture and balance
signs and symptoms of cerebellar disease
1) ataxia
2) gait ataxia
3) hypotonia
4) intention tremor
5) nystagmus
6) dysmteria
7) rebound phenomenon
8) dysdiadochokinesia
9) siorders of speech ( dysarthria)
10) decomposition of movement
what is the decomposition of movement
ability to carry out moto movement but in a component of motions ( not smoothly carried out)
what is the rebound phenomenon
over shooting of movement when resistenace is suddenly removed