The Human Brain : From Neurone to Nervous System

CLINICAL NEUROPHYSIOLOGY : ElectroEncephaloGraphy (EEG)


  1. When electrodes are placed on the scalp, it is possible to record the rhythms of electrical activity originating in the underlying cerebral cortex - this is known as the ElectroEncephaloGram (EEG).

  2. EEG rhythms change in frequency and amplitude determined reciprocal connections between the thalamus and cortex, and the analysis of EEG rhythms is of particular importance in sleep disorders and in epilepsy

  3. Other factors that affect EEG rhythm are brain tumours, ischaemia and metabolic disorders such as changes in blood calcium, pH and glucose, and liver failure.

  4. Recent developments in the technology surrounding the brain-computer interface use a variety of parameters of the EEG to provide a measure of control over robots such as robotic arms.





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