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CRANIAL NERVES. Nervi craniales (en-cephalici). They are characterized by the fact that they leave the cerebrospinal space through foramina in the base of the skull. Cranial nerve nuclei. Nuclei nervorum cranialium (encephalicorum). Nuclei of origin. Nuclei originis. They give rise to the efferent, mostly motor, nerve fibers. Nuclei of termination. Nuclei terminationis. Sensory nuclei where the afferent nerve fibers terminate and synapse with a second neuron. Mixed nerve. Nervus mixtus (n. mixtarum neurofibrarum). Considered to be a nerve containing both motor and sensory fibers; it can also refer to a nerve with somatic and visceral components.

Cutaneous branches. Rami cutanei. Cutaneous nerves or rami conducting impulses to the skin.

Articular branches. Rami articulares. Nerves or nerve rami conducting impulses to joints. Muscular branches. Rami musculares. Nerves or nerve rami extending to the muscles. Motor nerve. Nervus motorius. Nerve which only has fibers for muscles. Afferent fibers, e. g., from muscle spindles, are not considered when naming such nerves.

Sensory nerve. Nervus sensorius. Nerve containing afferent fibers which convey impulses to the central nervous system from peripheral receptors.

Communicating branch. Ramus communicans. Autonomic (visceral) nerve and ramus. Ner-vus et ramus autonomici (viscerales). Nerves and their rami that conduct impulses from the region of nerve supply to the viscera. Autonomic (visceral) plexus. Plexus autono-micus (visceralis). A plexus situated within an organ.

Vascular plexus. Plexus vascularis. Nerve plexus in the wall of vessels with sensory and autonomic components. Periarterial plexus. Plexus periarteriales. Nerve plexus within the adventitia of arteries. Nervi vasorum. Nerves supplying blood vessels.

Vasa nervorum. Blood vessels supplying nerves.

nervous tissue. Textus nervosus. Neuron (nerve cell). Neuron (neurocytus). Nerve cell body (perikaryon). Corpus neurale. Portion of a neuron containing the nucleus but excluding the cell processes. Axon (axis cylinder). Axon (neuritum). Usually a long process of a neuron which helps to form the peripheral nerves and can be either nonmy-elinated or myelinated.

Dendrite. Dendritum. One of many tree-like branched processes of a neuron. In contrast to the axons, it has no special sheath.

Feneis, Pocket Atlas of Human Anatomy © 2000 Thieme

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