Sunday 24 February 2019

Cranial Projection and Association Tracts and Limbic System





INTERNAL CAPSULE
• A compact band of
neocortical projection fibres
• Main highway for input &
output fibres of cerebral cx...


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Bundles implies long association fibres

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Corpus callosum fibres

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VA- ventral anterior
VL - ventral lateral

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NB Lentiform nucleus = GP + putamen

Tegmentum (Lat- Covering). Forms floor of midbrain cf.
Tectum (Lat- Roof). Forms roof of midbrain.
Stria (Lat- Stripe)
    Fasciculus (Lat- Bundle)
    Tapetum (Lat- Tapestry/rug)
    Habenula (Lat- reins). Denotes stalk of pineal gland and neighbouring neurons.




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Resembles a tapestry; the carpet of the brain. Primarily formed by decussating fibres of the splenium.

Septal nuclei are by septum pellucidum. Role in pleaseure/reward like Nucleus Accumbus.


Limbic System- a ring of memory and emotion (like a wedding ring).



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Simplified:

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Deontes a conerstone of memory processing/consolidation





Indusium (tunic/shirt) griseum is membranous layer of grey matter which covers the corpus callosum.




Cavernous Sinus

Cavernous Sinus Anatomy







All are in lateral wall except V1
From superior to inferior III, IV, V1, V2.


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Coronal scan through the cavernos sinus. MR contrast-enhanced FIESTA sequence. a, oculomotor nerve; b, trochlear nerve; c, abducens nerve; d, ophthalmic nerve; e, maxillary nerve; f, internal cerebral artery; cavernous segment; g, right optic nerve; h, pituitary gland