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16 apr 2024 · A nervous system can be defined as an organized group of cells, called neurons, specialized for the conduction of an impulse—an excited state—from a sensory receptor through a nerve network to an effector, the site at which the response occurs.
6 giorni fa · human nervous system, system that conducts stimuli from sensory receptors to the brain and spinal cord and conducts impulses back to other parts of the body. The conduction of electrochemical stimuli from sensory receptors occurs via organized groups of specialized cells, consisting largely of neurons, various neural support cells ...
5 apr 2024 · synapse, the site of transmission of electric nerve impulses between two nerve cells (neurons) or between a neuron and a gland or muscle cell (effector). A synaptic connection between a neuron and a muscle cell is called a neuromuscular junction.
- The Editors of Encyclopaedia Britannica
12 apr 2024 · The optic nerve is the second (CN II) cranial nerve (TA: nervus opticus or nervus cranialis II). It is a purely sensory nerve that conveys visual information from the eye to the brain . The nerve arises from the back of the globe exiting the orbit via the optic canal .
- Francis Deng
16 apr 2024 · Nerve pain in the hands and fingers is the result of direct or indirect damage to the radial nerve, ulnar nerve, median nerve, or branchial plexus nerve root. There are three main causes of damage: Overuse injuries that place repetitive stress on joints and the nerves that pass through them
19 apr 2024 · Individual nerve cells, or neurons, are the basic signaling units of the brain. The human brain contains a huge number of these cells, on the order of 86 billion neurons, that can be classified into at least a thousand different types.
1 apr 2024 · Zebrafish can regenerate after paralyzing spine injuries and regain locomotor ability, unlike mammals. Here authors show that the neurogenic factor Hb-egf promotes spinal cord regeneration in ...
