Upper Limb Flashcards
Deltoid acromial part origin
Acromion
Deltoid spinal part origin
Scapular Spine
Deltoid insertion
deltoid tuberosity of the humerus
Deltoid innervation
Axillary n.
Segment C5, C6
Deltoid Action Clavicular Part
Fleixion, internal rotation, adduction
Deltoid acromial part action
Abduction
Deltoid spinal part action
extension, external rotation, adduction
Supraspinatus origin
supraspinous fossa of the scapula
Infraspinatus origin
infraspinous fossa of the scapula
Teres Minor Origin
Lateral Border of the scapula
Subscapularis origin
subscapular fossa of the scapula
Supraspinatus, Infraspinatus, Teres Minor Insertion
Greater tubercle of the humerus
Supraspinatus - superior facet
Infraspinatus - middle facet
Teres Minor - inferior facet
Subscapularis insertion
Lesser tubercle of the humerus
Supraspinatus and Infraspinatus Innervation
Suprascapular n.
C4-C6
Teres Minor Innervation
Axillary n.
C5, C6
Subscapularis innervation
Subscapular n.
C5,C6,C7
Supraspinatus Action
Initiates abduction
Infraspinatus Action
External Rotation
Teres Minor Action
External Rotation, weak adduction
Subscapularis Action
Internal rotation
Coracobrachialis Origin
Coracoid process of the scapula
Coracobrachialis Insertion
Humerus (in line with the medial lip)
Coracobrachialis Innervation
Musculocutaneous nn.
C5-C7
Coracobrachialis Action
Flexion, adduction, internal rotation
Pectoralis Major clavicular part
Medial half of clavicle
Pectoralis Major sternocostal origin
Sternum and costal cartilage 1-6
Pectoralis Major abdominal origin
Rectus sheath (anterior layer)
Pectoralis Major insertion
lateral lip of the humerus
Pectoralis Major Innervation
Medial and Lateral pectoral nn.
C5-T1
Pectoralis Major Action
Entire Muscle: adduction and internal rotation
Clavicular and sternocostal parts: flexion, assists in respiration when shoulder is fixed
Deltoid clavicular origin
Lateral third of clavicle
Subclavius origin
1st rib
Subclavius insertion
inferior surface of the clavicle
Subclavius innervation
N. to subclavius
C5, C6
Subclavius Action
Steadies the clavicle in the sternoclavicular joint
Pectoralis Minor Origin
3rd to 5th ribs
Pectoralis Minor Insertion
Coracoid process
Pectoralis Minor innervation
Medial pectoral n. (C8, T1)
Pectoralis minor action
depress and anteriorly tilts the scapula
Rotates glenoid inferiorly
Serratus Anterior: superior, intermediate, and inferior part origin
1st to 9th ribs
Serratus Anterior: superior, intermediate, and inferior insertion
Medial border of the scapula
Serratus Anterior: superior, intermediate, and inferior innervation
Long thoracic n.
C5-C7
Serratus Anterior Superior part action
lowers the raised arm (extension of arm)
Serratus Anterior entire muscle action
Protraction
Elevates ribs when shoulder is fixed
Serratus Anterior Inferior part action
Rotates scapula laterally
Teres major origin
inferior angle of the scapula
Teres Major insertion
medial lip of the humerus
Teres Major Innervation
Lower subscapular n.
C5-C7
Teres Major Action
Internal rotation
Adduction
Extension
Biceps Brachii long head origin
supraglenoid tubercle of the scapula
Biceps brachii short head origin
coracoid process of the scapula
Biceps brachii long and short head insertion
radial tuberosity
Biceps brachii long and short head innervation
musculocutaneous n.
C5, C6
Biceps brachii action
Elbow joint: flexion and supination
Shoulder joint: flexion, stabilize humeral head during deltoid contraction, abduction, and internal rotation of the humerus
Brachialis origin
Distal half of anterior surface of the humerus
Brachialis insertion
ulnar tuberosity
Brachialis innervation
musculocutaneous n. C5, C6
radial n. C7, minor
Brachialis action
Flexion at the elbow joint
Triceps brachii long head origin
infraglenoid tubercle of the scapula
Triceps brachii medial head origin
posterior humerus, inferior to radial groove; medial intermuscular septum
Triceps brachii lateral head origin
posterior humerus, proximal to radial groove; lateral intermuscular septum
Triceps brachii insertion
olecranon of the ulna
Triceps brachii action
Elbow joint: extension
Shoulder joint: long head - extension and adduction
Anconeus origin
lateral epicondyle of the humerus (variance: posterior joint capsule)
Anconeus insertion
olecranon of ulna (radial surface)
Anconeus action
extends the elbow and tightens its joint
Triceps brachii and anconeus innveration
radial n.
C6-C8
Descending Trapezius origin, insertion, action
Occipital bone; nuchal ligament C1-C7
Lateral third of clavicle
Upward scapular rotation, rotates glenoid cavity superiorly, ipsilateral lateral flexion and contralateral rotation of head
Transverse Trapezius origin, insertion, action
Aponeurosis of T1-T4 spinous processes
Acromion
Retraction
Ascending Trapezius origin, insertion, action
T5-T12 spinous processes
scapular spine
medially rotates scapula downward
Trapezius innervation
Accessory n.
C3-C4 of cervical plexus
Levator Scapulae Origin
Transverse process C1-C4
Levator Scapulae Insertion
Superior angle of the scapula
Levator Scapulae Action
Upward scapular rotation, ipsilateral lateral flexion of the head
Rhomboid Minor Origin
Spinous process C7, T1
Rhomboid Minor Insertion
Root on the spine of scapula (medial border)
Rhomboid Major Origin
Spinous Process T2-T5
Rhomboid Major Insertion
Medial border inferior to the root of the scapular spine
Rhomboid major/minor action
Upward scapular rotation, steadies scapula
Levator Scapulae, Rhomboid Minor and Major innervation
Dorsal Scapular n.
C4-C5
Latissimus Dorsi Vertebral Origin
T7-T12 Spinous process; thoracolumbar fascia
Latissimus Dorsi Scapular Part
Inferior angle of the scapula
Latissimus Dorsi Costal Origin
Ribs 9-12
Latissimus Dorsi Iliac origin
Posterior third of the iliac crest
Latissimus Dorsi Insertion
Floor of the intertubercular groove of the humerus
Latissimus Dorsi Innervation
Thoracodorsal n.
C6-C8
Latissimus Dorsi action
Internal rotation, adduction, extension, respiration