cerebellum Flashcards
where is the cerebellum located in the metencephalon?
Dorsal portion
The development of teh fetal cerebellum directly correlates with what?
coordination after birth
precocial spp. will get up immediately after birth like hroses and cows
The cerebellum connects to what regions of the brain?
Many: sensory, cognition, language and emotion
How does the cerebellum connect to the brainstem?
via cerebellar peduncles
rostral, middle and caudal
The cerebellum is made up of:
vermis, 2 hemispheres and flocculonodular lobe
Where is the flocculondoular lobe of the cerebellum?
is the ventral portion of the cerebellum
Flocculonodular lobe of the cerebellum functions to
regulate equillibrium with vestibular system
The Vermis and Rostral Lobe function in:
Spinal cord function and postural tone
The vermis and caudal lob function in:
regulation of skilled movements (coordination)
What is the primary responsibility of the cerebellum?
to determine rate, range and force of movements
Does the cerebellum function to initiate movement?
No
Clinical disease to the cerebellum causes
ataxia (incoordination)
Clinical disease to teh cerebellum does NOT causes:
loss of function or paresis
Vestibular ataxia
head and body tilt
Cerebellar ataxia
Rate , range and force
dysmetria
unable to regulate rate, range and/or force of movements
Hypermetria
over measurement in the gait response
Vestibulocochlear nerve functions
hearing and balance
What are clinical signs of CN 8-vestibulocochlear nerve lesion?
hearing loss, nystagmus, head tilt, nausea, inappetance
How to test for CN8 lesion?
tracking, positioning of head, bang pots and pans, etc.
Where does CN8 arise from?
midbrain
Opisthotonus
Decerebellate posture
*extended neck and thoracic limbs, flexed hips
Most primary cerebllar diseases are:
congenital
What are congenital cerebellar diseases caused by:
in-utero infection
ie) panleukpenia virus in vats and BVD in cattle
Cerebellar abiotriphy
malformation of the cerebellum
cerebellar abiotrophy is common in
canine and equine
–> kerry blue terriers, chinese crested and arabians
What are clinical signs of cerebellar abiotrophy?
Normal at birth with progressive cerebellar ataxia
- mild- severe gait abnormalities
- rate progression varies with canine breeds
Cerebellar Neoplasia at cerebellar peduncle leasion causes
ipsilateral CN signs and contralateral peripheral/body signs
what are potential clinical signs of a R. cerebellar peduncle lesion?
dysmetria/hypermetria of the left limbs, head tilt to the right, etc.
