3 - Kines - Unit 1 - Shoulder & Arm Flashcards
Muscles Origins, Insertion & actions - Deltoid
The “shoulder” muscle
[Origin]
Spine of the scapula
Acromion process of the scapula
Lateral third of the clavicle
[Insertion]
Deltoid tuberosity of the humerus (lateral mid-humeral shaft)
[Action]
Flexion of the shoulder
Extension of the shoulder
Abduction of the shoulder
Muscles Origins, Insertion & actions - Trapezius
[Origin]
Base of the skull
Nuchal ligament
Spinous processes of C7-T12
[Insertion]
Spine of the scapula
Acromion process of the scapula
Lateral third of the clavicle
[Action]
Elevation of the scapula
Depression of the scapula
Retraction of the scapula
Muscles Origins, Insertion & actions - Latissimus Dorsi
The broadest muscle of the back
[Origin]
Spinous processes of T7-Sacrum
Thoracolumbar Aponeurosis
Iliac crest
[Insertion]
Crest of the lesser tubercle of the humerus
[Action]
Adduction of the shoulder
Extension of the shoulder
Internal rotation of the shoulder
Muscles Origins, Insertion & actions - Teres Major
[Origin]
Inferior angle of the scapula
Lower lateral border of the scapula
[Insertion]
Crest of the lesser tubercle of the humerus
[Action]
Adduction of the shoulder
Extension of the shoulder
Internal rotation of the shoulder
Muscles Origins, Insertion & actions - Rotator cuff muscles
SITS
- Supraspinatus
- Infraspinatus
- Teres Minor
- Subscapularis
Muscles Origins, Insertion & Actions - Rotator cuff muscles - Supraspinatus
[Origin]
Supraspinous fossa of the scapula
[Insertion]
Greater tubercle of the humerus
[Action]
Abduction of the shoulder
Muscles Origins, Insertion & Actions - Rotator cuff muscles - Infraspinatus
[Origin]
Infraspinous fossa of the scapula
[Insertion]
Greater tubercle of the humerus
[Action]
External rotation of the shoulder
Muscles Origins, Insertion & Actions - Rotator cuff muscles - Teres Minor
[Origin]
Upper lateral border of the scapula
[Insertion]
Greater tubercle of the humerus
[Action]
External rotation of the shoulder
Muscles Origins, Insertion & Actions - Rotator cuff muscles - Subscapularis
[Origin]
Subscapular fossa of the scapula
[Insertion]
Lesser tubercle of the humerus
[Action]
Internal rotation of the shoulder
Muscles Origins, Insertion & Actions - Rhomboids (major and Minor)
[Origin]
Spinous processes C7-T5
[Insertion]
Medial border of the scapula
[Action]
Retraction of the scapula
Muscles Origins, Insertion & Actions - Serratus Anterior
[Origin]
Anterior surface of the first eight ribs
[Insertion]
Medial border of the scapula
[Action]
Protraction of the scapula
Muscles Origins, Insertion & Actions - Levator scapula
[Origin]
Transverse processes of C1-C4
[Insertion]
Superior angle of the scapula
[Action]
Elevation of the scapula
Muscles Origins, Insertion & Actions - Pectoralis Major
[Origin]
Sternum
Ribs
Medial half of the clavicle
[Insertion]
Crest of the greater tubercle of the humerus
[Action]
Adduction of the shoulder
Internal rotation of the shoulder
Horizontal adduction of the shoulder
Muscles Origins, Insertion & Actions - Pectoralis Minor
[Origin]
Anterior surface of the 3rd, 4th & 5th ribs
[Insertion]
Coracoid process of the scapula
[Action]
Protraction of the scapula
Depression of the scapula
Muscles Origins, Insertion & Actions - Coracobrachialis
[Origin]
Coracoid process of the scapula
[Insertion]
Medial surface of mid-humeral shaft
[Action]
Flexion of the shoulder
Adduction of the shoulder
Muscles that form the auxiliary (= arm pit) borders
- Lattissimus dorsi
- Teres major
- Pectoralis major
Thoracic Outlet Syndrome (TOS)
Test bonus question: write definition
A tight pectoralis minor can compress the neurovascular bundle of the upper extremity causing pain, abnormal sensations and weakness in the upper extremity
Shoulder Complex or pectoral Girdles - Bones
6 bones - 3 each side
- Scapula (shoulder blades) - x2
- Humerus (arm bone) - x2
- Clavicle (collar bone) - x2
Landsmarks - Definition - Border
An edge of a bone
Landsmarks - Definition - Angle
Created by two borders coming together
Landsmarks - Definition - Fossa
A shallow depression or dent in a bone
Landsmarks - Definition - Process
A prominent bony growth that projects
Landsmarks - Definition - Tubercle
A small, rounded process
Tendon attachement point
Landsmarks - Definition - Head
A rounded projection at the end of a bone at an articulation