Movement Anatomy - Class 17

Shoulder: Bones, Ligaments, Muscles + Origin/Insertion/Action/Innervation, Arthrokinematics, Planes of motion

Name the structures/View

Anterior View

Jugular Notch

Clavicular Facet

Costal Facet

Name the structures/view

Superior surface

Acromion

Sternum

Name the structure/view

Inferior Surface

Acromial facet

Conoid tubercle

Costal tuberosity

Name the structure/view

Posterior view

Coracoid process

Acromion

Spine

Lateral angle

Inferior angle

Name the structure/view

Anterior view

Acromion

Coracoid process

Sternum

Name the structures/view

Anterior view

Greater tubercle

Intertubercle groove

Head

Anatomic neck

On lesser tubercle

Name the structures/view

Posterior view

Radial groove

Name the ligaments/view

Clavicle

Costoclavicular ligament

1st rib

Sternoclavicular ligament with capsule

Interclavicular ligament

Manubrium

Articular disc

Anterior bundle

Posterior bundle

Name the ligaments/view

Acromion

Acromioclavicular ligament

Clavicle

Coracoacromial ligament

Coracoid process

Coracohumeral ligament

Conoid ligament

Trapezoid ligament

Coracoclavicular ligament

Name the ligaments/view

Acromioclavicular ligament

Coracoacromial ligament

Subacromial space

Coracohumeral ligament

Transverse ligament

Conoid ligament

Trapezoid ligament

Coracoclavicular ligament

Name the muscles/view

Posterior view

Trapezius: Upper, middle, and lower

What is the origin/insertion/action/innervation of the upper trapezius?

Origin: External Occipital protuberance, ligamentum nuchae, medial superior nuchal line

Insertion: Posterior-superior aspect of the lateral one third of the clavicle

Action: Scapular elevation, upward rotation of scapula

Innervation: Spinal Accessory n.

What is the origin/insertion/action/innervation of the middle trapezius?

Origin: Ligamentum nuchae, spinous processes of C7-T5

Insertion: Medial aspect of acromion

Action: Retraction of scapula

Innervation: Spinal Accessory n.

What is the origin/insertion/action/innervation of the lower trapezius?

Origin: Spinous process of T6-T12

Insertion: Upper lip of spine of scapula near medial border

Action: Scapular depression, Upward rotation of scapula, scapular retraction

Innervation: Spinal Accessory n.

What is this muscle/view?

Levator Scapular

Rhomboid major and minor

What is the origin/insertion/action/innervation of the levator scapula?

Origin: Transverse processes of C1-C4

Insertion: Medial border of scapula between superior angle and root of scapular spine

Action: Elevation of scapula, Downward rotation of scapula

Innervation: Dorsal Scapular n.

What is the origin/insertion/action/innervation of the Rhomboid major and minor?

Origin: Ligamentum nuchae and C7-T5 spinous processes

Insertion: Medial border of scapula from root to inferior angle

Action: Scapular retraction, elevation and downward rotation

Innervation: Dorsal Scapular n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Serratus Anterior

Origin: External surface of the lateral region of the first nine ribs

Insertion: Entire medial border of the scapula, with a concentration of fibers near the inferior angle

Action: Scapular protraction and upward rotation

Innervation: Long Thoracic n.

What are these muscles/views?

Subclavius

Pectoralis minor

What is the origin/insertion/action/innervation of the subclavius?

Origin: Near cartilage of first rib

Insertion: Inferior surface of clavicle

Action: Depression of clavicle

Innervation: Branch from upper trunk of brachial plexus

What is the origin/insertion/action/innervation of the pectoralis minor?

Origin: Anterior surface of ribs 3-5

Insertion: Coracoid process of scapula

Action: Scapular depression, downward rotation and anterior tilt

Innervation: Medial pectoral n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Supraspinatus

Origin: Supraspinatus fossa

Insertion: Greater tubercle of humerus

Action: Shoulder abduction

Innervation: Suprascapular n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Pectoralis major - Clavicular head - Sternal head

Origin:
Clavicular head: Anterior margin of the medial portion of the clavicle
Sternal head: Lateral margin of the manubrium and body of the sternum and cartilages of the first six to seven ribs

Insertion: Crest of the greater tubercle of the humerus

Action: Internal rotation, flexion, horizontal adduction, depression of shoulder

Innervation: Lateral and medial pectoral nerve

What is these muscles?

Infraspinatus

Teres minor

What is the origin/insertion/action/innervation of the infraspinatus?

Origin: Infraspinatus fossa

Insertion: Greater tubercle of humerus

Action: Shoulder external rotation

Innervation: Suprascapular n.

What is the origin/insertion/action/innervation of the teres minor?

Origin: Posterior surface of the lateral border of scapula

Insertion: Greater tubercle of the humerus

Action: Shoulder external rotation and adduction

Innervation: Axillary n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Teres Major

Origin: Inferior angle of the scapula
 
Insertion: Crest of lesser tubercle of humerus

Action: Shoulder adduction, extension, and internal rotation

Innervation: Lower subscapular n.

What are these muscles/view?

Posterior view

Supraspinatus

Infraspinatus

Teres minor

Teres major

What is the muscle/origin/insertion/action/innervation?

Muscle: Subscapularis

Origin: Subscapular fossa

Insertion: Lesser tubercle of humerus

Action: Shoulder internal rotation

Innervation: Upper and lower subscapular n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Latissimus dorsi

Origin: Thoracolumbar fascia, spinous process of lower thoracic and lumbar vertebrae, posterior crest of ilium, lower four ribs, and inferior angle of scapula.

Insertion: Floor of intertubercular groove of humerus

Action: Shoulder adduction, extension, internal rotation and depression

Innervation: Thoracodorsal n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Biceps Brachii - Long/short head

Origin:
  Long Head: Supraglenoid tubercle
  Short Head: Coracoid process

Insertion: Common tendon to bicipital tuberosity of radius

Action: Shoulder flexion, elbow flexion, forearm supination

Innervation: Musculocutaneous n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Coracobrachilis

Origin: Coracoid process of the scapula

Insertion: Medial aspect of the proximal shaft of the humerus

Action: Shoulder flexion

Innervation: Musculocutaneous n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Deltoid - Posterior, middle, anterior

Origin:
  Anterior: Anterior surface of lateral clavicle
  Middle: Superior-lateral acromion
  Posterior: Spine of scapula
 
Insertion: Deltoid tuberosity of humerus

Action:
  Anterior: Shoulder flexion, horizontal   adduction, internal rotation and abduction
  Middle: Shoulder abduction and flexion
  Posterior: Shoulder extension, horizontal   abduction and external rotation

Innervation: Axillary n.

What is the muscle/origin/insertion/action/innervation?

Muscle: Long head of triceps

Origin: Infraglenoid tubercle

Insertion: Olecranon process of ulna

Action: Shoulder extension and elbow extension

Innervation: Radial n.

Describe the arthrokinematics of the shoulder

Arthrokinematics: Glenohumeral Joint

Glenoid = Concave
Humerus = Convex 

Convex + Concave = Opposite

Concave + Convex = Same

What plane of motion does the scapula move in elevation/depression?

It moves in a frontal plane of motion

What plane of motion does the scapula move in protraction/retraction?

It moves in a transverse plane of motion

What plane of motion does the scapula move in upward/downward rotation?

It moves in a frontal plane of motion

What plane of motion does the scapula move in anterior/posterior tilting?

It moves in a sagittal plane of motion