Dendrite: Definition, Function, and Malfunction
Dendrite Definition Dendrites are projections of a neuron (nerve cell) that receive signals (information) from other neurons. The transfer of information from one neuron to another is achieved …
Neurology
Median Nerve: Definition, Anatomy, Distribution & Injury
Definition The median nerve is a branch of the brachial plexus that innervates the palm and back of part of the hand. This mixed nerve …
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Cranial Nerves: Definition, Function, and List
Definition The cranial nerves of reptiles, birds, and mammals consist of twelve pairs of numbered peripheral nerves that originate in the cerebrum and brainstem and …
Sensory Neuron: Definition, Structure, Function & Types
Definition A sensory neuron (sometimes called an afferent neuron) is a nerve cell that detects and responds to external signals. Sensory neurons receive information through …
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Semantic Memory: Definition and Example
Definition Semantic memory is a cognitive sub-topic in psychology regarding the human ability to remember knowledge and facts. Though studied for decades, much about it …
Neuron: Definition, Function, Parts, Structure, Types & More
Definition A neuron is a single nervous system cell that receives, processes, and transmits electrochemical messages from and to other cells. Neurons connect different areas …
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Neuromuscular Junction: Definition and Structure
Definition A neuromuscular junction (NMJ), also called a myoneural junction, is the connection between a motor neurons and a muscle fibers. These neurons are the …
Neurogenesis ( Adult Psychology)
Neurogenesis Definition Adult neurogenesis is the generation of new neurons in adults. These neurons arise from progenitor cells or stem cells. This usually happens during …
Nervous Tissue: Definition, Types, and Function
Nervous Tissue Definition Nervous tissue is the term for groups of organized cells in the nervous system, which is the organ system that controls the …
Myelin Sheath: Definition and Function
Myelin Sheath Definition The myelin sheath is a fatty insulating later that surrounds the nerve cells of jawed vertebrates, or gnathostomes. All extant members of …