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Lecture notes Biopsychology 3-4 (PSY1004F)
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BIOPSYCHOLOGY Gross Anatomy of The BrainTHE CENTRAL NERVOUS SYSTEM:
Cerebrospinal fluid (CFS) – surrounds the brain and spine
Meninges – pad your brain
Ventricles – fluid into the brain via these
Deep inside the brain
Interconnecting
Aqueduct of CSF
Too much fluid = hydrocephalus
MENINGES
Pia
Arachnoid
Dura
MAJOR DIVISIONS
RHIAIN COSLETT
, Hindbrain
» Develops first
» Basic functions are here
» Brain stem: supports vital function
» Medulla: plays important role in vital functions (breathing,
circulation, HR)
» Pons: carries nerve impulses between levels of NS (sleep &
arousal)
» Cerebellum: motor-coordination centre
Concerned with muscular movement, coordination &
memory
Regulates complex movement
Interrupted by alcohol
Midbrain (thalamus is here)
» Contains clusters of sensory and motor neurons
Reticular Formation (gatekeeper): alerts higher centres
of the brain that messages are coming and either blocks or
allows
Relays information from hind and forebrain
System of dopamine – releasing neurons originate here
RAS: group of fibres in the centre of the brain stem that
run between midbrain and hindbrain, active in the
regulation of sleep and being awake. Damage can result in
a coma
DOPAMINE
RHIAIN COSLETT
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