ANAT30007 Lecture Notes - Lecture 3: Hypertonia, Basal Ganglia, Central Nervous System
25 Jul 2018
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Document Summary
Brodmann areas = result of microcsopic analysis of the whole brain, looking for differences in organisation (based on cellular differences) Located b/w diencephalon (interbrain) and the spinal cord. Composed of three main divisions: midbrain = mesencephalon, pons (the bridge, medulla oblongata = myelencephalon = bulbus. Motor neurons can be very long and extend from cortex throughout spinal cord) Upper motor neuron in cortex (cell body can be found anywhere within grey matter) 80% upper motor neurons starting on one side of the brain cross over the brain stem (in medullary pyramids) to other side in spinal cord e. g. left-brain controls right side. Corticospinal tracts pyramidal system pathway for descending/motor neurons from cortices to spinal cord. Lateral = (80%) cortex to lateral area of spinal cord >> to skeletal muscles in distal parts of the limbs, undergoes decussation (crossing) in medulla.
