BUS 17 Lecture Notes - Lecture 4: Parietal Lobe, Frontal Lobe, Paresthesia
Document Summary
Consequence of a paroxysmal uncontrolled discharge of neurons within the cns. Range from major motor convulsion to a brief period of lack of awareness. Prodrome: mood or behavioural changes which may precede the attack by some hours. Aura: symptom immediately before a seizure and will localise the attack to its point of origin within the nervous system. Postictal period: time immediately after the ictus during which the patient may be confused, disorientated and demonstrate automatic behaviours. Stereotyped and uncontrollable nature of the attack characteristic of epilepsy. Epilepsy if one person has more than one seizure epilepsy can be symptom of other disorders and there are numerous different epilepsy syndromes. A sudden excessive disorderly discharge of cerebral neurons" as the causation of the attack. Central role of the excitatory neurotransmitter glutamate produces a depolarisation shift by activating receptors which in turn facilitate cellular influx of na+, k+ and ca2+
