EEG Questions And Answers 2025

EEG Questions And Answers 2025 Electroencephalogram (EEG) - Correct Answer a recording of the rhythmic electrical activity that can be made from the cerebral cortex via electrodes placed on the skull How does opening eyes changes the EEG output? - Correct Answer lower amplitude, higher frequency Alpha rhythm - Correct Answer 8-13 Hz, awake relaxed adult with eyes closed Beta rhythm - Correct Answer 13-30 Hz, awake adult with open eyes Theta rhythm - Correct Answer 4-7Hx, drowsiness Delta rhythm - Correct Answer .5-4Hz, sleep paradoxical sleep - Correct Answer REM sleep, the EEG looks almost like the EEG of an awake person what gives the EEG its shape? - Correct Answer The waves are derived from alternating excitatory and inhibitory synaptic potentials that occur in cortical neurons as a result of thalamocortical and other inputs. when awake, are the alternating excitatory and inhibitory potentials that give the EEG its shape in phase or out of phase? What about in sleep? - Correct Answer Awake- the inputs are irregular or out of phase Sleep- in phase, get a larger amplitude EEG What is the EEG pattern of a patient in a coma? - Correct Answer EEG is dominated by delta activity what is the EEG patter of a brain dead patient? - Correct Answer sustained flat EEG reading what is the EEG pattern of a patient with petit mal seizures? - Correct Answer EEG displays spikes and wave activity what is the EEG activity of a patient with grand mal seizures? - Correct Answer EEG shows widely distributed seizure activity what is the EEG activity of a patient with partial seizures? - Correct Answer EEG reveals spikes in the affected areas how can an EEG be used to test the integrity of a sensory pathway? - Correct Answer apply the electrodes and stimulate areas of the body and see if the sensation makes it to the brain and the brain recognizes it somatosensory evoked potentials (SEP) - Correct Answer cortical potentials generated by the response of sensory neurons to the stimulation of peripheral nerves