Phenotype: midbrain myelination decreased process quality, abnormal
Note: This statement combines anatomy and/or ontology terms with phenotype quality terms to create a complete phenotype (EQ) statement. For detailed information on individual terms, click the hyperlinked term name.
Name: midbrain
Synonyms: mesencephalon
Definition: The brain region between the forebrain anteriorly and the hindbrain posteriorly, including the tectum dorsally and the midbrain tegmentum ventrally.
Ontology: Anatomy Ontology [ZFA:0000128]
Name: myelination
Synonyms: myelinogenesis
Definition: The process in which myelin sheaths are formed and maintained around neurons. Oligodendrocytes in the brain and spinal cord and Schwann cells in the peripheral nervous system wrap axons with compact layers of their plasma membrane. Adjacent myelin segments are separated by a non-myelinated stretch of axon called a node of Ranvier.
Ontology: GO: Biological Process [GO:0042552]    QuickGO    AmiGO
Name: decreased process quality
Synonyms:
Definition: A quality of a process that has a value that is decreased compared to normal or average.
Ontology: Phenotypic Quality Ontology [PATO:0002302]