Biology

Lumbar Plexus Definition Lumbar plexus is a group of four nerves (L1, L2, L3 and L4) that are located in front of the hip joint…

Peripheral Nervous System Definition Peripheral nervous system (PNS) is the part of the nervous system in vertebrate animals that lies outside of the brain and…

Myelin Protein Zero Definition Myelin protein zero (PO, MPZ) is a glycoprotein which in humans is encoded by the MPZ gene. This gene is specifically…

Oligodendrocyte Definition Oligodendrocyte is any of the neuroglial cells of the central nervous system that are responsible for the formation of myelin sheaths in the…

Dendritic Spine Definition Dendritic spines are a preferential site of synaptic axodendritic contact; they are sparse or absent in some types of nerve cells (motor…

Purkinje Cell Definition Purkinje cell is a large, densely branching neuron in the cerebellar cortex of the brain. These cells were first discovered in 1837…

About Cerebellum Definition Cerebellum is the part of the vertebrate brain that is located below the cerebrum at the rear of the skull and that…

Medulla Oblongata Definition Medulla oblongata is the lowermost portion of the brainstem in humans and other mammals. It is important in the reflex control of…

Eosinophil Definition Eosinophil is a type of white blood cell containing cytoplasmic granules that are easily stained by eosin or other acid dyes. It is…

Progenitor Cell Definition Progenitor cell is a cell that originates from a stem cell and differentiates into a more specialized cell. A progenitor cell is…

Neurotrophin Definition Neurotrophins (neurotrophic factors) are proteins which induce the survival of neurons and are found in the blood stream. Neurotrophins are capable of signaling…

Schwann cell Definition Schwann cell is any of the cells that cover the axons in the peripheral nervous system and form the myelin sheath. It…