Somatic nerves Flashcards
types of neurones (number of extensions)
bipolar, multipolar, pseudounipolar
what is a muscle fascicle
bundle of nerve fibres
what is the gap between myelin sheath cover called
node of ranvier
blood supplying nerve is
vasa nervorum
dermatome
area of skin supplied by a single spinal nerve
myotome
part of muscle supplied by a single spinal nerve
why are myotomes and dermatomes useful
for testing motor or sensory loss of one or more spinal nerves or segments by testing joint movement or an area of skin. one muscle myotome may involve multiple spinal segments
what is motor end plate
place where neuromuscular junction is. signal comes, chemical reaction happens and muscle will contract
what is difference between somatic and autonomic nervous system
somatic voluntary and general sensation(skin), visceral involuntary
somatic reflex arc
sensory receptor, impulse travels along sensory neurone, in through dorsal horn, CNS interneurons, out along motor neurone, effector muscle contracts