muscles and nerves Flashcards
functions of muscle
movement
static support
heat production
types of muscle
skeletal
cardiac
smooth
where is skeletal muscle found
attached to skeleton
function of skeletal muscle
locomotion
is skeletal muscle voluntary or involuntary
voluntary
where is cardiac muscle found
heart
function of cardiac muscle
blood circulation
is cardiac muscle voluntary or involuntary
involuntary
where is smooth muscle found
walls of vessels and organs
function of smooth muscle
move substances and restrict flow
is smooth muscle voluntary or involuntary
involuntary
breakdown of skeletal muscle
epimysium
perimysium
fascicle
endomysium
muscle fibre
what attaches bone to muscle
tendon
what is the outer layer of muscle called
epimysium
what is the outer layer of a fascicle called
perimysium
what do fascicles contain
muscle fibres
what layer covers muscle fibres
endomysium
characteristics of tendons and aponeuroses
dense fibrous connective tissue
do not shorten
can alter force direction
muscles passing over a joint will have what affect
they will act on that joint
action at elbow joint
flexors and extensors working in opposition
action at shoulder joint
stabilised by join action of rotator cuff muscles
action in hand
forearm muscles for powerful grip
intrinsic hand muscles for precision
muscle compartments of arm
flexor (anterior) and extensor (posterior)
muscle compartments of forearm
flexor-pronator and extensor-supinator
all extensors in the upper limb are supplied by what nerve
radial nerve
composition of CNS
brain and spinal cord
composition of PNS
12 cranial and 31 spinal nerves
functional divisions of nervous system
somatic
autonomic
enteric
how many spinal nerves are ther
31 pairs over 5 regions
where is the C1 spinal nerve
between skull and atlas
plexus meaning
network
nerves supplying upper and lower limbs originate in….
plexus
nerves supplying upper and lower limbs originate in….
plexus
dorsal root carries what type of signal
sensory/afferent
ventral root carries what type of signal
motor/efferent
rami carry what type of signal
both sensory and motor
spinal nerves carry what type of signal
both sensory and motor
what are myotomes and dermatomes
areas supplied by a single spinal nerve
T4 dermatome
nipples
t4 titties
T10
bellybutton