SHOULDER & UPPER ARM

Do Now• Frodo Baggins places a flag in the ground. He walks 200 yards north. He then walks 200 yards east, and then 200 yards south. He is now back at the flag. Where is he?

Review

• Joints have 2 functions• Hold bones together• Allow for flexibility• Structural classification• Fibrous• Cartilaginous• Synovial

Review

• Synarthorotic Joints• Amphirarthrotic Joints• Diarthrotic Joints

Review

• The spine (vertebral column) spans from the base of the skull, all the way to the pelvis• Function – Major core support and protects the spinal cord• Curvature• Kyphosis (hunch back)• Lordosis

Review

• 24 single vertebrae make up the spine• An additional 2 fused bones at the bottom

(sacrum and coccyx) help provide a flexible curved structure

•What are the 3 different types of vertebrae?• Cervical Vertebrae • Thoracic Vertebrae• Lumbar Vertebrae

Review

• Herniated Disk• Cervical Sprain (Whiplash)• Spina Bifida

Bones of the Shoulder• Clavicle• Scapula• Humerus

Clavicle• “Collarbone”• Double curved• Connects sternum to the scapula/shoulder• Holds arm away from thorax• Prevents shoulder dislocations

Clavicle Fractures•When fractured, shoulder collapses towards the midline• Among the most frequent fractures in all of sports• “FOOSH”• Fall on tip of shoulder

Sternoclavicular Joint• Clavicle articulates with the manubrium of the sternum• Creates “SC” joint• Only connection of arm and trunk

Scapula• “Shoulder blade”• Very important with shoulder motion• Flare outwards to promote motion• Acromion & Coracoid Processes• Acromion creates the joint for clavicle• Acromioclavicular joint• Coracoid Process is an attachement for several muscles

necessary for arm mobility• Glenoid Cavity

Acromioclavicular Sprain• Joint of the Acromion Process and clavicle• Common among football players• Sprains are a result from direct impact• Downward, backward or inward force

Humerus• Long bone• Rounded at its proximal end to fit to glenoid cavity• Head of the Humerus• Neck of Humerus just inferior to the head• Deltoid Tuberosity• Attachment of the deltoid• Greater and lesser tubercles

Homework•Worksheet