Reticular Activating System, EEG, Sleep and Arousal

Reticular Activating
system, EEG, Sleep and
Arousal
Objectives

to describe major divison and functions of the reticular
system

understand the basis of generation of the EEG

to know various waves in EEG and understand the use of EEG

sleep

disorders of sleep



Reticular formation

group of interlacing
network of neurons that
occupy the midventral
portions of medulla and
midbrain

originate in upper
brainstem and protect
through synaptic relays in
the rostral intralaminar
thalamic nuclei to the
cerebral cortex




Reticular Activating system, EEG, Sleep and Arousal 1

, 🧠 gamma lower motor neurons play a role in muscle tone




the reticular formation has afferent and efferent connections




afferent connections efferent connections




the reticular formation plays the primary role in sleep. it is
considered the main switch of the cerebral cortex



if the reticular formation is activated then you will be
awake. if they reticular formation is deactivated then you
will sleep



Physiological divisons of the reticular system

ascending reticular system




Reticular Activating system, EEG, Sleep and Arousal 2