SHOULDER ANATOMY
This presentation is the property of its rightful owner.
Sponsored Links
1 / 18

SHOULDER ANATOMY PowerPoint PPT Presentation


  • 127 Views
  • Uploaded on
  • Presentation posted in: General

SHOULDER ANATOMY. BONY ANATOMY. Humerus • proximal end articulates with scapula to from shoulder • distal end articulates with bones of the forearm to form elbow. Scapula • the shoulder blade Glenoid fossa has ring of cartilage called labrum to deepen the articular surface

Download Presentation

SHOULDER ANATOMY

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Shoulder anatomy

SHOULDER ANATOMY


Shoulder anatomy

BONY ANATOMY


Shoulder anatomy

Humerus

•proximal end articulates with scapula to from shoulder

• distal end articulates with bones of the forearm to form elbow


Shoulder anatomy

Scapula

• the shoulder blade

Glenoid fossa has ring of cartilage called labrum to deepen the articular surface

• the glenoid fossa of the scapula articulates with the humerus to form the glenohumeral joint (shoulder)

• the acromion process articulates with the clavicle to from the acromioclavicular joint (tip of the shoulder)


Shoulder anatomy

Clavicle

• distally articulates with the acromion process to form the AC joint

• Proximally articulates with the sternum to form SC joint


Review of joints

Review of Joints

  • Glenoid fossa+humerus=glenohumeral joint (GH) (scapula)

  • Acromion process + clavicle =acromioclavicular (scapula)(AC)

  • Sternum + clavicle=sternoclavicular (SC)

  • Scapula+rib cage= scapulothoracic articulation


Shoulder anatomy

MUSCLATURE


Shoulder anatomy

Trapezius

• large, triangular muscle

• starts at base of skull, runs out to tip of shoulder and down to the 12th thoracic vertebrae

• functions to shrug and square the shoulders


Shoulder anatomy

Rhomboids

• group of two muscles that run diagonally from the spine to the medial border of the scapula

• they function to retract the scapula


Shoulder anatomy

Latissimus Dorsi

• the “lats”

• gives wing like appearance to sides

• starts along the thoracic vertebrae of back and inserts on the anterior aspect of humerus

• functions extend , adduct and medially rotate the arm


Shoulder anatomy

Pectoralis Major

• the chest muscle

• originates along the sternum and clavicle, inserts on the humerus

• it functions to:

~ adduct

~ flex

~medially rotate

the arm.


Shoulder anatomy

Deltoid

• the muslce that gives contour to the shoulder

• originates along the spine of the scapula and clavicle, inserts on the humerus

• all fibers abduct the arm

• anterior fibers: flex and medially rotate arm

• posterior fibers: extend and laterally rotate arm


Shoulder anatomy

Biceps

• the “popeye” muscle

• on anterior aspect of arm

• crosses both the shoulder and elbow

• flexes the arm


Shoulder anatomy

Triceps

• on the posterior aspect of the arm

• crosses both the shoulder and elbow

• extends the arm


Rotator cuff

Rotator Cuff

  • Group of four muscles that act to hold the head of the humerus into the glenoid fossa

    • Supraspinatus

    • Infraspinatus

    • Teres Minor

    • Subscapularis


Rotator cuff cont

Rotator Cuff cont.

  • Supraspinatus: 1st 10 degrees of abduction

  • Infraspinatus: external rotation

  • Teres minor: external rotation

  • Subscapularis: internal rotation


Shoulder anatomy

** Note that there are no muscles on the inferior aspect of the shoulder!! This will be important when we talk about shoulder injuries


Labrum

Labrum

  • Ring of cartilage similar to the menisci of the knee.

  • Deepens the articular surface of the genoid fossa and adds to the stability of the shoulder


  • Login