pectoral girdle Flashcards
features of the clavicle
S shape
sternal end round, acromial end flat
superior surface smooth, inferior surface topography
function of the clavicle
increase range of movement at the shoulder
transmits supportive stress to upper limb
protects auxillary neurovascular bundle
inferior surface of the clavicle
acromial end trapezoid line conoid tuberosity subclavian sulcus costal tuberosity sternal end
superior surface of the clavicle
muscle attachments
attachments on the inferior clavicle (5)
costoclavicular ligament pectoralis major sternohyoid conoid ligament subclavius
attachments on the superior clavicle (3)
trapezius
sternocleidomastoid
deltoid
attachments of costoclavicular ligament
costal tuberosity to 1st rib
attachments and function of pectorals major
sternal angle of clavicle and anterior sternum to lateral lip of intertubercular groove of humerus
adduction, medial rotation and flexion of arm
attachments and function of sternohyoid
inside sternal angle and posterior of manubrium of sternum to hyoid bone
depress hyoid
attachments of conoid ligament
conoid process of scapula to conoid tubercle of clavicle
attachments and function of subclavius
1st rib to subclavian groove of clavicle
depress clavicle
attachments and function of trapezius
superior nuchal line to lateral and posterior clavicle and lateral acromion and lower border of spine of scapula of scapula
adduction, elevation, depression and rotation of scapula
attachments and function of sternocleidomastoid
medial and posterior clavicle and anterior sternum to mastoid process of temporalis
rotation and flexion of head
attachments and function of deltoid
lateral and anterior clavicle and lateral acromion and lower border of spine of scapula to deltoid tuberosity of humerus
flexion, extension, adduction and rotation of arm
non-metric traits
variation in shape
costal tuberosity/impression
acromial end
position of nutrient foramen
clavicular trauma
most frequently fractured bone
occurs at curvatures
can cause damage to subclavian blood vessels
alters shape - shortens
features of hyoid bone
doesn’t articulate with other bone
attachment of tongue musculature
fractured in manual strangulation
greater and lesser cornu fuse in adulthood
muscles on anterior inferior body of hyoid bone
digastric
stylohyoid
mylohyoid
attachments and function of digastric
hyoid to digastric fossa on temporal and inner inferior border of mandible
jaw movement
attachments and function of stylohyoid
hyoid to styloid process on temporal
tongue elevation
attachments and function of mylohyoid
mylohyoid line of mandible to hyoid
raise floor of mouth and tongue
basics of scapula
posterior of the body
suspended by musculature
triangular and concave anteriorly
articulates: humerus - glenoid fossa, clavicle - acromion
features of scapula
acromioclavicular facet coracoid process suprascapular notch surgical and anatomical neck glenoid fossa glenoid tubercle acromion spinoglenoid fossa spine of scapula
surfaces, angles and borders of the scapula
subscapular fossa
supraspinous fossa
infraspinous fossa
superior and inferior angle
medial, lateral and superior border
acromion muscles
deltoid
trapezius
glenoid and coracoid muscles
biceps brachii
triceps brachii
pectoralis minor
anterior surface muscles
subscapularis
posterior surface muscles
supraspinous
infraspinous
lateral border muscles
teres minor
teres major
attachments and function of biceps brachii
supraglenoid tubercle and coronoid process of scapula to radial tuberosity of radius
supination and flexion of forearm
attachments and function of triceps brachii
infraglenoid tubercle of scapula and posterior diaphysis of humerus to olecranon of ulna
extension of forearm
attachments and function of pectorals minor
ribs 3-5 to coracoid process
scapula forward and downward
attachments and function of subscapularis
subscapular fossa of scapula to lesser tubercle of humerus
stabilisation of shoulder and medial rotation
attachments and function of supraspinatus
supraspinous fossa of scapula to greater tubercle of humerus
abduction of arm and stabilisation
attachments and function of infraspinatus
infraspinous fossa of scapula to greater tubercle of humerus
abduction and lateral rotation of arm
attachments and function of teres minor
lateral border of scapula to greater tubercle of humerus
lateral rotation, adduction and stabilisation of shoulder
attachments and function of teres major
lateral border of scapula to medial lip of intertubercular groove of humerus
medial rotation, adduction and extension
