Cre Bellum

7/28/2019 Cre Bellum

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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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Cre Bellum