Bones and Landmarks
This flat bone connects the humerus to the clavicle and has a prominent ridge or spine on its posterior surface.
Scapula
This muscle is on the Lateral Side of the upper arm
Teres Major OIA
O: Inferior Angle of Scapula
I Leser Tubercle of Humerus
A: Shoulder extension, adduction, medial rotation
Type of Joint and Actions of the Glenhumeral Joint (aka Shoulder joint)
Actions :
Shoulder Flexion/ Extension
Shoulder Abduction/Adduction
Shoulder Medial/Lateral Rotation
What Nerve is associated with the Deltoid Muscle
Axillary Nerve
This shallow depression on the scapula articulates with the head of the humerus.
Glenoid fossa (or cavity)
Name the SITS Muscles or Rotary Cuff Muscles
Supraspinatus
Infraspinatus
Teres Minor
Subscapularis
Subscapularis OIA
O: Supscapular Fossa of anterior scapula
I: Lesser tubercle of humerus
A: Shoulder Medial Rotation, stabilizes humerus
Actions of the Scapula
Depression/Elevation
Protractrion/ Retraction
This end of the clavicle articulates with the acromion of the scapula.
Acromion End
Describe what makes up the Pectoral Girdle
and where those articulate with each other
Scapula + Clavicle
The arcomion end of the clavicle articulates with the Acromion Process of the Scapula
This Muscle is inferior to the Rhomboid Minor
and its action is to retract the scapula
Rhomboid Major
Posterior Head/ Thorax
Levator Scapulae OIA
O: Transverse Process of (C1-C4)
I: Medial Border of Scapula
A: Scapular elevation
(Remember Levator sounds like elevator to lift scapula)
Example Question
what muscle action of the scapula is required to throw a punch?
Protraction
(think projectile forward like you throw your arm forward in a punch)
Which two muscles retract the scapula?
Rhomboid Major
Rhomboid Minor
Identify the landmark between the Greater and Less tubercle of the humerus
Intertubercle Groove
Muscle originates on ribs 1-8 it inserts on the medial border of scapula and its main action is scapular Protraction
Serratus Anterior
(remember serraded or jagged look from attatchment to all the ribs)
Latissimus Dorsi OIAN
O: Spinous Processes of T7-L5 and Iliac Crest
I: Intertubercular Groove of the Humerus
Action: Shoulder Extension Adduction and Medial Rotation
(Strong Gladiator big Back muscle Idk Sounds like gladiator name)
Shoulder adduction and medial rotation
Where does the Latissimus Dorsi Insert?
The Intertubercular Groove of the Humurus
Identify this land mark on the humerous this raised area serves as the attachment site for the deltoid muscle.
Deltoid Tuberosity
Anterior Thorax
OIAN of the Coracobrachialis
O: coracoid process of scapula
I: Shaft of Humerus
A: Shoulder Flexion and Adduction
N: Musculocutaneous Nerve
OIAN of Trapezius
O : Occipital Bone, Spinous Processes of Thoracic Vertebrae (C7-T12)
I:Acromion, Spine of Scapula, Clavicle
A: Scapular Retraction, Elevation, Stability
What SITS muscle does Lateral Rotation of the Shoulder and Stabilizes the Humerus
Infraspinatus
The Acromion Process of the scapula is on which al side of the scapula
lateral and posterior side