DEEP GREY MATTER Flashcards
What is the striatum?
Parts of lentiform nucleus?
Caudate and Putamen
Putamen and globus pallidus
Location of Habenular commissure
Above pineal gland
Which part of substantia nigra associated with globus pallidus?
Pars reticulata (phylogenetic οτι ήταν ένας nucleus και η internal capsule το έσπρωξε κάτω)
Vicq D’ Azyr bundle?
Mammilary-thalamic tract (mammilary bodies to antrerior thalamic nuclei)
Position of deep brain stimulation?
Subthalamic nulceus
Describe the network of information transfer
Fibers from Cortex ->Caudate and putamen ->Globus Pallidus -> (STN) ->Thalamus ->SbN ->Cortex
What is the pars compacta called ?
Called neo-striatum
what does a direct pathway do?
What does an indirect pathway do?
Increases motor activity (Substantia Nigra - Dopamine more motor)
Decreases motor activity (Striatal interneurons -Cholinergic reduces motor)
Anatomy lentiform nucleus
Putamen - Lateral medullar laminae-External GPe- Medial medullary laminae-Internal GPi
Anatomy lateral to Putamen?
External capsule, Clostrum, Extreme Capsule, Insular cortex, Insular cistern
SN pars reticulata
SN pars compacta
Resembles GPi
DOPAMINE
Pallidal connections
Afferents (προσαγωγες ινες)
- Striatopallidal fibers to both segments
- Subthalamopallidal fibers to medial segment
Efferents (απαγωγές ίνες)
- Pallidosubthalamic from lateral segment
- Pallidothalamic from medial to ventral anterior and ventral lateral
- Small group to midbrain
Which is the only downward fibre projection of the basal ganglia?
The peduncular nucleus - pedunculopontine fibres
Parts of the epithalamus
Pineal gland and Habenular commissure
Ansa lenticularis fibers?
From GP to Thalamus (that big loop under the IC)
