Origin:Supraspinous
fossa of the scapula .
Insertion:superior on
the greater tuberosity
of the humerus
Initiation of
abduction to
20
Infraspinatus
Origin:infraspinatus
fossa of the scapula.
Insertion :inferior
and posterior on
greater tuberosity
External
Rotation
weakening and tearing of
the tendons forming the
rotator cuff under stress
Decreases the range of
motion in the shoulder
Rotator cuff degeneration & tear
Teres
Minor
Origin:lateral
border of the
scapula.
Insertion:inferior
to infraspinatus
on the greater
tuberosity
External
Rotation of the
Humerus
Subscapularis
Origin:
subscapular fossa
of the scapula.
Insertion : lesser
tuberosity of the
humerus
Internal
Rotation of the
humerus
Shoulder muscles
Pectoralis Minor
Origin: ribs 3-5
Insertion :Coracoid
process of the scapula
Actions :Protraction(forward) and
retraction(backward) of the
scapula.
Pectoralis Major
Origin :medial 1/2 of the
clavicle, manubrium &
body of sternum, costal
cartilages of ribs 2-6.
Insertion :Lateral lip of
bicipital groove
(humerus)
Actions :1-Adduction of
the arm.
2-medial rotation
of the arm
3-Flexion of the
arm.
Teres Major
Origin :Dorsal surface of the
inferior angle of the
scapula.
Insertion: The medial lip of the
bicipital groove
(intertubercular sulcus)
of the humerus.
Action :Medial rotation &
Adduction of
humerus.
Deltoid
Origin :Anterior (clavicular) head:
anterior surface of the lateral
clavicle. b. Middle (acromial)
head: acromion process and
spine of the scapula. -
Insertion :
Deltoid
tuberosity of
the humerus.
Action :Adduction
from 20˚ to 90˚
Latissimus Dorsi
Origin :vertebral spines from T7
to the sacrum, posterior 1/3 of
iliac crest. • Posterior layer of
thoracolumbar fascia lower 3 or
4 ribs. • sometimes from the inf.
angle of scapula.
Insertion :floor of
the intertubercular
groove
Action :rotates the arm
medially • adducts
arm • Extends the
arm
Serratus Anterior
Origin:surface of the
1st to 8th ribs at the
side of the chest
Insertion: along the entire
anterior length of the
medial border of the
scapula.
Action: Laterally rotates
and protracts scapula
Bones
Clavicle
surfaces
Inferior surface
Rough due to the
attachments of ligaments
trapezoid
line
Conoid tubercle
Superficial surface
Smooth
No ligaments attached
Ends
Acromial
End
Flat
Articulates with
Acromoin process
of the scapula
Acromioclavicular joint
Sternal
End
Rounded
Articulates with
sternum bone
of the chest
Sternoclavicular joint
Lateral 1/3 is
convex backward
+medial 2/3 is
convex forward
Moving
from
anterior
to
posterior
A
transition
the clavicle is
more prone to
injuries at
that site
Scapula
2 surfaces
Anterior
Posterior
3 borders
Lateral
Medial
Superior
3 angles
Superior
inferior
Lateral
4 fossae
Glenoid fossae
Where a humerus
articulates
Glenohumeral Joint
Supraspinous
Divided by the spine
Infraspinous
Subscapular
2
processes
Acromion
Articulates
with clavicle
Acrmoioclavicular Joint
Coracoid
Articulates with
clavicle
coracocvicular joint
Shoulder Blade
Humerus
Head of humerus
Intertubuler groove
between lesser and greater tubercles
Surgical
neck
Anatomical Neck
Shaft
Challenges
Athletes
face
Motivation
Media
Coaches
Training
and
Practice
Career Vision
Popularity
Priorities
Injuries
In sports, they
most
commonly
occur in MSK
structures
Results due to :
Not taking the proper safety
precautions.illegal play.
Wrong training technique.
insufficient warm up. Not
using sutiable protective
techniques. Overuse.
preexisting disorder
Types
contact injury
contusions
(bruises) or
lacerations(tears
in
skin)