A&P1 Upper Limb Flashcards
What are the components of the upper limb?
Shoulder
Arm
Forearm
Hand
What are the pectoral girdles?
Shoulder girdles
Attaches upper limbs to axial skeleton
Pectoral girdles are a part of which skeleton plane?
Appendicular
Humans have two pectoral girdles each composing what two structures?
Clavicle
Scapula
Where does the clavicle articulate?
What force does it transfer?
With sternum and scapula
Transmits mechanical force from upper limb to trunk
Define Conoid Tubercle
Site of attachment of conoid portion of coracoclavicular ligament
Where is the coracoclavicular ligament located?
Between clavicle and coracoid process of scapula
What does the scapula articulate with?
Clavicle and humerus
Scapula articulates with bones ______ but is held in place _______ by musculature
Anterior
Posterior
Define acromion
Lateral end of scapular spine and high point of the shoulder
What land mark on the scapula/upper limbs do tailors use for measurements?
Length of upper arm from acromium
Define glenoid cavity
Accepts humerus head to form glenohumeral joint
What is the thinner edge of the scapula?
What is the thicker edge of the scapula?
Medial border (vertebral border) Lateral border (axillary border)
Medial and lateral borders of the scapula form ____ _____
Inferior angle
Superior and medial border join at _____ ______
Superior angle
Define scapular notch
Suprascapular notch
Superior border indentation where suprascapular nerve passes
Define Coracoid process
Crow’s break
Lateral end of superior border
What muscle/ligaments attaches at the coracoid process?
Muscle: Pec minor
Coracobrachialis
Bicep
Ligament: Coracoacromial
Conoid
Trapezoid
Define supraspinous fossa
Define infraspinous fossa
Define subscapular foss
Supra: attachment of supraspinatus muscle
Infra: attachment for infraspinatus muscle
Sub: anterior surface attachment for subscapularis muscle
What does the superior transverse scapular ligament do?
Transverses scapular notch, converts to foramen
Where does the omohyoid muscle originate?
Scapular notch, extending to superior transverse scapular ligament
Where do the suprascapular nerve and artery travel?
On way to supraspinatus muscle, nerve travel under transverse scapular ligament; artery travels over ligament
What does the suprascapular nerve provide sensation for?
Sensory to shoulder joint
Motor to infra/supraspinatus muscles
Define suparascapular neuritis
Entrapment neuropathy caused by compression of suprascapular nerve
Pain radiates from C5/6 dermatomes, reproduced w/ pressure over nerve in notch
Prolonged entrapment leads to wasting of infra/supraspinatus muscles