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Cerebellum
Dr. Mahnoor Khursheed
Study Objectives
• Introduction
• Location
• Gross Anatomy
• Neurovasculature
• Fuction
Location
• Posterior cranial fossa.
Surfaces
• Superior Surface
• Inferior Surface
Peduncles
• Superior Cerebellar
Peduncle
• Middle Cerebellar
Peduncle
• Inferior Cerebellar
Peduncle
Vermis
Two cerebellar
hemispheres joined
by a narrow median
vermis.
Fissures
• Horizontal
• Primary
• Uvulondular
Lobes
• Anterior lobe
• Middle lobe
• Flocculonodular lobe
Internal Structure
Layers of Cerebellar Cortex
• External or molecular layer
• Middle or purkinje Cell layer
• Internal or granular layer
Intra-Cerebellar Nuclei
• Dentate nucleus
• Emboilform nucleus
• Globose nucleus
• Fastigial nucleus
White Matter
• Intrinsic Fibers
• Afferent Fibers
• Efferent Fibers
Blood supply
Arterial Supply:
• Superior cerebellar artery
• Posterior inferior cerebellar artery
• Anterior inferior cerebellar artery
Venous Drainage:
• Straight sinus
• Transverse sinus
• Sigmoid sinus
• Inferior petrosal sinus
• Occipital sinus
Function
• Co-ordination of movements.
• Timing of motor activities and in rapid progression from one
movement to the next.
• The cerebellum is important for making postural adjustments in
order to maintain balance.
• Through its input from vestibular receptors and proprioceptors, it
modulates commands to motor neurons to compensate for shifts in
body position or changes in load upon muscles.
Any Questions?
Thank you.

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Cerebellum.pptx