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Brain Impractical Uno. Gross Brain Structures. Compiled by MF Dauzvardis. Cerebellum.

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Brain impractical uno

Brain Impractical Uno

Gross Brain Structures

Compiled by MF Dauzvardis


Cerebellum
Cerebellum

Covers the fourth ventricle, responsible for the initiation and planning of movement, cerebellar signs are ipsilateral, midline lobe is called vermis, highly crenated cortex is called “arbor vitae”, key cells = pyramidal, granular, and molecular


Pineal
Pineal

Secretes melatonin, seat of the soul, biological clock?, third eye in some fishes and amphibians.


Medulla
Medulla

Just rostral to cervical cord, contains critical breathing centers, fed by vertebral and pica arteries (lateral wallenberg syndrome when pica is blocked)


Pons

“bridge” Covered largely by the 4th ventricle and the cerebellum. Fed in part by the basilar artery, Many cortical pontine fibers end in the pontine gray nuclei which in turn project to the cerebellum via the MCP


Midbrain
Midbrain

Key features: cerebral peduncles, aqueduct of Sylvius, substantia nigra, tectum (inferior and superior colliculi) red nucleus, CN III, IV


Fourth ventricle
Fourth ventricle

Contains csf, choroid plexuses, foramen luscka(lateral) and magendie(medial) lead to cisterna magna and subarachnoid space. CSF leaves midbrain via aqueduct of Silvius


Aqueduct of silvius
Aqueduct of Silvius

Connects 4th ventricle to 3rd ventricle, obstruction can lead to hydrocephaly, surrounded by periaqueductal gray (PAG)—related to pain


3 rd ventricle
3rd ventricle

Filled with CSF, sits between thalami and enters hypothalamus, connects to lateral ventricles via foremen of monroe, contains some choroid and also the stria medullaris thalami which connect habenula to septal nuclei


Tectum
Tectum

Consists of superior and inferior colliculi, don’t forget SLO-AIM


Medulla1
Medulla

Just rostral to cervical cord, contains critical breathing centers, fed by vertebral and pica arteries (lateral wallenberg syndrome when pica is blocked)


Pons

“bridge” Covered largely by the 4th ventricle and the cerebellum. Fed in part by the basilar artery, Many cortical pontine fibers end in the pontine gray nuclei which in turn project to the cerebellum via the MCP


Midbrain1
Midbrain

Key features: cerebral peduncles, aqueduct of Sylvius, substantia nigra, tectum (inferior and superior colliculi) red nucleus, CN III, IV


Cerebellum1
Cerebellum

Covers the fourth ventricle, responsible for the initiation and planning of movement, cerebellar sighs are ipsilateral, midline lobe is called vermis, highly lobulated cortex is called “arbor vitae”, key cells = pyramidal, granular, and molecular


4 th ventricle
4th ventricle

Contains csf, choroid plexuses, foramen luska(lateral) and magendi(medial) lead to cisterna magna and subarachnoid space. CSF leaves midbrain via aqueduct of Silvius


Aqueduct
Aqueduct

Connects 4th ventricle to 3rd ventricle, obstruction can lead to hydrocephaly, surrounded by periaqueductal gray (PAG)—related to pain


3 rd ventricle1
3rd ventricle

Filled with CSF, sits between thalami and enters hypothalamus, connects to lateral ventricles via foremen of monroe, contains some choroid and also the stria medullaris thalami which connect habenula to septal nuclei


Tectum1
Tectum

Consists of superior and inferior colliculi, don’t forget SLO-AIM










I





V










Floor of 4 th ventricle
Floor of 4th ventricle


Cerebellar peducles
Cerebellar peducles

Superior (brachium conjunctivum), Middle (brachium pontis), Inferior (restiform body)


Superior and inferior colliculi
Superior and inferior colliculi

Slo-aim--------superior colliculi, lat geniculate, optic stuff-------auditory stuff, inf colliculus,med geniculate,



Thalami
Thalami

Major relay station for sensory information





Pulvinar nucleus of thalamus nucleus is “peppered”


Obex—opening of central canal into 4 nucleus is “peppered”th ventricle


Cerebral peduncle—connects cerebrum to brainstem—mainly descending motor fibers. Rostrally it turns into the internal capsule


Brachium(arm) of the superior colliculus descending motor fibers. Rostrally it turns into the internal capsule


Brachium of the inferior colliculus descending motor fibers. Rostrally it turns into the internal capsule


3 descending motor fibers. Rostrally it turns into the internal capsulerd ventricle


Genu of corpus collosum descending motor fibers. Rostrally it turns into the internal capsule


Anterior limb of internal capsule descending motor fibers. Rostrally it turns into the internal capsule


Genu of internal capsule descending motor fibers. Rostrally it turns into the internal capsule


Posterior limb of internal capsule descending motor fibers. Rostrally it turns into the internal capsule


Splenium of corpus collosum descending motor fibers. Rostrally it turns into the internal capsule


Visual cortex descending motor fibers. Rostrally it turns into the internal capsule


Head of caudate descending motor fibers. Rostrally it turns into the internal capsule


Putamen descending motor fibers. Rostrally it turns into the internal capsule


Globus pallidus descending motor fibers. Rostrally it turns into the internal capsule


Insula descending motor fibers. Rostrally it turns into the internal capsule


Thalamus descending motor fibers. Rostrally it turns into the internal capsule


Columns of fornix—hippocampus to mammilary bodies descending motor fibers. Rostrally it turns into the internal capsule


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