Neuromuscular, Digestive and Respiratory Systems: Role of reticular formation

Role of reticular formation

ROLE OF RETICULAR FORMATION

Ascending projections to the BSRF to cortex involves in maintenance of cortical excitability and consciousness.
Wakefulness depend on an adequate impulse from BSRF through the Ascending Reticular Activating System( ARAS) and Diffuse Thalamo Cortical Projection System( DTPS)
Neuro humoral theory suggests the involvement of noradrenaline and serotonin in sleep- wakefulness rhythm.
Noradrenaline from nerve endings of medullary cells have positive influence on ARAS and maintain wakefulness. It also responsive for phasic events of sleep like rapid eye movement( REM).
Serotonin produced by the midbrain raphe nucleus is a depressant acting on the BSRF and diminishes the ascending reticular drive, ultimately end up in sleep.
Acetyl choline balances the action of NE and serotonin in sleep – wakefulness rhythm.
Melatonin- pineal hormone causes sleep and act as a trigger switching the reticular system to act through other neurotransmitter .

Last modified: Friday, 27 May 2011, 6:41 AM

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VPB 121: Veterinary Physiology - II (2+1)

Role of reticular formation

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