cre bellum
TRANSCRIPT
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Cerebellumwww.mangonursing.in
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Largest part of the Hind Brain
Weight: 150 gramsIt lies below the tentorium
cerebelli in the posterior cranial
fossa.www.mangonursing.in
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SURFACES
BORDERS
NOTCHES
FISSURES
SUPERIOR
INFERIOR
ANTERIOR
POSTERIOR
ANTERIOR CEREBELLAR NOTCH
POSTERIOR CEREBELLAR NOTCH
HORIZONTAL FISSURE
FISSURE PRIMA
POST LUNATE FISSURE
POST PYRAMYDAL FISSUREwww.mangonursing.in
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Two deep fissures Primary fissure
Posterolateral fissure
Three lobs
Flocculonodular lobe flocculus
and nodule
Anterior lobe
Posterior lobeCorpus of
cerebellar
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Primary fissure
Posterolateral fissureFlocculonodular lobe
Anterior lobe
Posterior lobe
corpus of
cerebellar
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Primary fissure
Posterolateral fissureFlocculonodular lobe
Anterior lobe
Posterior lobe
corpus of
cerebellar
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SUPERIRIOR VERMIS:
1. LINGULA2. CENTRAL LOBE
3. CULMEN
4. DECLIVE5. FOLIUM
INFERIOR VERMIS:
1. TUBER
2. PYRAMID
3. UVULA
4. NODULE
PARTS OF VERMIS
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Anteriorly: Fourth ventricle, medulla and Pons
Posteriorly: Occipital Bone
Laterally: Sigmoid sinus, mastoid Antrum and
Mastoid air cells.
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Three peduncles
Inferior cerebellar peduncle connect with medulla and withspinal cord, contain both afferent and efferent fibers
Middle cerebellar peduncle connect with pons, containafferent fibers
Superior cerebellar peduncle connect with midbrain, containmostly efferent fibers
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Vestibulocerebellum
Archicerebellum
Flocculonodular lobe
Spinocerebellum
Paleocerebellum Vermis and intermediate
zone
Cerebrocerebellum
Neocerebellum Lateral zone
Flocculonodular lobe
Vermis
Inte
rmediatezone
La
teralzone
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1. VESTIBULAR PART of vestibulo-cochlear
nerve.
2. Spinal chord
3. Cerebral cortex
4. midbrain
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Special relay nuclei
Vent. anterior nucleus (VA)
Vent. intermediate nucleus (VI)
Receiving dentate nucleus, globus pallidus and
substantia nigra to motor cortex
Vent. posteromedial nucleus (VPM)receives trigeminal lemniscus and testefibers
Vent. posterolateral nucleus (VPL)receives medial lemniscus and spinal lemniscusProjects to first somatic sensory area via central
thalamic radiation
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Includes Thalamic medullary
stria
Habenular trigone
Habenularcommissure
Pineal body
posterior commissure
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Positionlies ventral to thalamus
Boundaries
Superiorly: hypothalamic sulcus
Inferiorly:
optic chiasma
tuber cinereum
Infundibulum
mamillary body
Anterior: lamina terminalis Posterior: continues with
midbrain tegmentum
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Transition zone
between diencephalons
and tegmentum of
midbrain
Contain subthalamic
nucleus, parts of red
nucleus and substantia
nigra
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Subdivisions Preoptic region
Supraoptic region
Tuberal region
Mamillary region
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Paraventricular nucleus
Supraoptic nucleus
Mamillary nucleus
arcuate nucleus
Paraventriculohypophyeal
tract
Supraopticohypophyseal
tract
infundibulum
posterior lobe of hypophysisanterior lobe of hypophsis
tuberoinfundibular tract
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Paraventricular nucleus
Paraventriculohypophyseal tract
Supraoptic nucleus
Supraopticohypophyseal trac
posterior lobe of hypophysis
Inferior hypophyseal a.
Hypophyseal v.
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Tuberoinfundibular tract
Median eminence
Portal v.
Superior hypophyseal a.
Hypophyseal v.anterior lobe
Parvicellular neurons in the
arcuate nucleus and nearby
region of the walls of the third
ventricle secrete releasing andinhibiting hormones
tuberoinfundibular tract
portal vein of hypophsis
anterior lobe of hypophsis
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Function Regulates functions of neuroendocrine system
Autonomic nervous system
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Position: a narrow ventricle
cleft lies within diencephalons Boundaries
Roof: choroids plexus
Floor: optic chiasma, tuber
cinereum, infundibulum and
mamillary body Anterior: lamina terminalis
Posterior: continuous with
mesencephalic aqueduct
Lateral wall: dorsal thalamus and
hypothalamus
Communication
Third ventricle mesencephalic aqueduct
fourth ventricle
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ATONIA
CEREBELLAR ATAXIA
VERTIGO
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