Human Phenotype Ontology 
Grandparent Node:
expandEEG abnormality (HP:0002353)help
Parent Node:
expandInterictal EEG abnormality (HP:0025373)help
..Starting node
..expandAbsent posterior alpha rhythm (HP:0031518)help
Term ID: 31518
Name: Absent posterior alpha rhythm
Synonym:
Definition: Lack of normal alpha rhythm in the EEG. Alpha rhythm has been defined as a rhythm at 8-13 Hz occurring during wakefulness over the posterior regions of the head, generally with higher voltage over the occipital areas. Amplitude is variable but is mostly below 50 microvolt in adults. It is best seen with eyes closed and under conditions of physical relaxation and relative mental inactivity. It is blocked or attenuated by attention, especially visual and mental effort. One should here note the difference between the terms alpha rhythm and alpha activity: Alpha activity refers to activity in the range of 8-13 Hz and alpha rhythm is the activity of 8-13 Hz with specific characteristics as defined above.
Comments:
Reference: HP:0031518
Genes and Diseases:
 
       Child Nodes:

 Sister Nodes: 
..expandContinuous spike and waves during slow sleep (HP:0031491) help
..expandIncreased theta frequency activity in EEG (HP:0031535) help
..expandNormal interictal EEG (HP:0002372) help
InputHPO IDHPO termDistanceGeneGene id entrezHGNC IDDiseaseIdDiseaseNameFrequencyOnsetHGMD variantsClinVar variants
 
HPO disease - gene - phenotype typical associations:
 
HPO disease - gene - phenotype less frequent non-typical associations:
HP:0031518HP:0031518Absent posterior alpha rhythm0 CL E G H


Genes (0) :

Diseases (0) :
 

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium. The version used here is December 15 2022 release.