support of shoulder joint Flashcards
what is involved in the CNS
brain
spinal cord
what is involved in the PNS
cranial nerves
spinal nerves
what nerves form the brachial plexus
C6,C7,C8,T1,T2
where is the brachial plexus located
axillary region
what is the afferent supply
carry impulses from structure to brain
sensory nerve fibres
what is the efferent supply
carry impulses from brain to structure (muscle or organ)
motor nerve fibres
what are mixed nerves
consist of both motor and sensory fibres
transmit messages in both directions at once
what does the brachial plexus supply
all intrinsic muscles
some extrinsic muscles :
latissimus dorsi
serratus ventralis
pectorals
types of joints
fibrous
cartilagenous
synovial
what range of motion do synovial joints allow
large
what is hyaline cartilage
covers articular surfaces
reduces friction
avascular
no nerve endings
synovial fluid
sticky
nourishes cartilage
lubricates
what is the synovial membrane
produces synovial fluid
physical barrier to contain fluid
what is the joint capsule
fibrous layer
incorporates synovial membrane
attaches around osteochondral junction
function of ligaments
support joints
hold bones together
restrict movements
what is flexion
folded limb
non-weight bearing position
what is extension
stretching limb
associated with weight bearing
components of the shoulder joint
glenoid cavity of the scapula
head of humerus
palpable landmarks of the shoulder joint
acromion process of the scapula
greater tubercle of the humerus
what does the bicipital bursa do
wraps around tendon of origin of biceps brachii
intertubercular groove
transverse ligament
lateral support of the shoulder joint
supraspinatus m
infraspinatus m
medial support of the shoulder joint
subscapularis m
extensors of shoulder joint
brachiocephalicus
biceps brachii
flexors of shoulder joint
latissimus dorsi
teres major
teres minor
deltoideus
triceps
