PubMed:2726165 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PubMed/sourceid/2726165","sourcedb":"PubMed","sourceid":"2726165","source_url":"http://www.ncbi.nlm.nih.gov/pubmed/2726165","text":"The (+/-) reference in pattern electroretinogram recording.\nIn this communication, the value of using a simultaneously acquired estimate of background noise, the (+/-) reference, is demonstrated in pattern electroretinogram (PERG) recording. During the signal averaging process, the (+/-) reference inverts the polarity of every other sweep; cycle-locked (stimulus-related) activity is thus cancelled out, leaving a noise distribution similar in statistical properties to that of the signal average. Assessing the presence of a PERG response by comparing the spectrum analysis of the PERG trace with that of the (+/-) reference is discussed. The results of the normal controls and patient groups are summarized and the raw waveforms from a representative normal observer and a patient with optic nerve damage are analyzed.","tracks":[{"project":"PubmedHPO","denotations":[{"id":"T1","span":{"begin":391,"end":400},"obj":"HP_0002664"}],"attributes":[{"subj":"T1","pred":"source","obj":"PubmedHPO"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"PubmedHPO","color":"#9f93ec","default":true}]}]}}