Cerebellum
part 1
functions of the cerebellum
tone of muscles - spinocerebellum
posture and balance - vestibulocerebellum
coordination of movements - cerebrocerebellum
lesions of the cerebellum can produce hypotonia
cerebellum has three components:
anterior lobe
posterior lobe
flocculus area (flocculonodular lobe)
all three areas are functionally different and there
connections are different
the most primitive area is the flocculonodular area. it is
present in the fish
this lobe is responsible for balance
can also be called archicerebellum
the paleocerebellum is the anterior lobe. this is responsible
for the tone in the muscle
the neocerebellum is the posterior lobe. this is responsible
for coordination of movement
Cerebellum 1
, cerebellum controls the posture and balance and coordination
of the movement IPSILATERALLY
cerebrum controls the motor system CONTRALATERALLY
vermis controls the axial musculature (shoulder, hip and
trunk)
intermediate zone controls the fine movement of the distal
muscles.
midline lesions causes axial ataxia
lateral lesions might affect motor controls related to the
hands and feet
cerebrocerebellum is also known as pontocerebellum
the cerebellum knows the initial position of all the muscles
in the body. it is unconscious. unconscious proprioception is
carried by the spinocerebellar tracts
before the movement starts the cerebellum and the basal
ganglia fires. these areas monitors the planning of the
movements and the initial position of the muscles that are
going to do the movement
outside of the cerebellum there is the cerebellar cortex with
grey matter (surface grey matter)
after this there is white matter
Cerebellum 2
part 1
functions of the cerebellum
tone of muscles - spinocerebellum
posture and balance - vestibulocerebellum
coordination of movements - cerebrocerebellum
lesions of the cerebellum can produce hypotonia
cerebellum has three components:
anterior lobe
posterior lobe
flocculus area (flocculonodular lobe)
all three areas are functionally different and there
connections are different
the most primitive area is the flocculonodular area. it is
present in the fish
this lobe is responsible for balance
can also be called archicerebellum
the paleocerebellum is the anterior lobe. this is responsible
for the tone in the muscle
the neocerebellum is the posterior lobe. this is responsible
for coordination of movement
Cerebellum 1
, cerebellum controls the posture and balance and coordination
of the movement IPSILATERALLY
cerebrum controls the motor system CONTRALATERALLY
vermis controls the axial musculature (shoulder, hip and
trunk)
intermediate zone controls the fine movement of the distal
muscles.
midline lesions causes axial ataxia
lateral lesions might affect motor controls related to the
hands and feet
cerebrocerebellum is also known as pontocerebellum
the cerebellum knows the initial position of all the muscles
in the body. it is unconscious. unconscious proprioception is
carried by the spinocerebellar tracts
before the movement starts the cerebellum and the basal
ganglia fires. these areas monitors the planning of the
movements and the initial position of the muscles that are
going to do the movement
outside of the cerebellum there is the cerebellar cortex with
grey matter (surface grey matter)
after this there is white matter
Cerebellum 2
