IN 1934, Adrian and Matthews 1 showed that rhythmic electrical potential changes could be recorded from the occiput in man when the subject's eyes were illuminated by a bright flickering light.
A dedicated retinohypothalamic tract acts as one conduit for photic information from the retina to the SCN. Logically, one would presume that the visual photoreceptors of the retina, the rods and ...
Bright light can also trigger sneezing for certain people. "It's called a photic sneeze, which (happens) when you look at the sun or any bright light," says Lane. The photic sneeze reflex is an ...
J Child Neurol. 2004;19(8):571-578. Patients with an isolated visually induced seizure in special circumstances, with or without a photoparoxysmal response on the EEG. This group comprises ...
A black-and-white manta ray flexes its wings and soars past for a look. We are still in the photic zone, where sunlight penetrates and provides energy for countless microscopic, photosynthetic ...
All records were obtained while the patient was awake and resting, asleep and under standardized conditions of provocation — that is, hyperventilation, photic stimulation and audio stimulation.