NEURO- intro to autonomic nervous system Flashcards
define the central nervous system and outline what it is responsible for
brain and spinal cord
connect majority of nerves and synaptic connections
responsible for integrating, processing and coordinating sensory data and motor functions
higher functions such as intelligence, memory, learning and emotion
define the peripheral nervous system and what its function is
cranial nerves, spinal nerves, ganglia (contains peripherally located nerve cell bodies)
functions
transmit sensory information to the CNS from receptors in peripheral tissues and organs (afferent / sensory division)
transmit motor demands from the CNS to peripheral tissue and organs (efferent / motor division)
what is the role of the somatic nervous system
innervation of musculoskeletal structures
detect changes in internal environment and organ system
what is the role of the autonomic nervous system
innervation of smooth muscle, cardiac muscle and secretory glands
detects changes in internal environment - sympathetic nervous system, parasympathetic nervous system, enteric nervous system
how many pairs of spinal nerves are there and what are they
31
8 cervical - leave above the vertebrae 12 thoracic - leave below the vertebrae 5 lumbar - have to travel a considerable distance 5 sacral 1 coccygeal
what are myotomes
group of muscles primarily innervated by the motor fibres of a single nerve root
what are dermatomes
skin supplies by sensory fibres of a single nerve root
what is a rami
anterior division of a spinal nerve
what are the great plexus’ of the body
cervical, brachial, lumbar, sacral
as they travel the unite and branch to form different components
what are the elements of the brachial plexus
reach - roots - C5-T1
to - trunks - superior (C5/C6 join), middle (C7), inferior (C8/T1 join)
drink - divisions - anterior (C5/C7), posterior (T1)
cold- cords- lateral, medial, posterior
beer - branches - musculocutaneous, median, ulnar, axillary, radial
what are the 5 terminal branches of the brachial plexus
musculocutaneous median ulnar axillary radial
what is the meninge
three soft tissue layers that cover and protect the CNS
what are the names of the layers in the meninge
pia mater
arachnoid mater
dura mater
what are the characteristics of the pia mater
delicate vascularised layer
tightly adheres to the surface
continues as filum terminable and denticulate ligaments
what are the characteristics of the arachnoid mater
avascular membrane lining dural sac
