PS 1001:03 Lecture Notes - Lecture 16: Bicipital Groove, Triceps Brachii Muscle, Biceps
Discuss movements which occur in the shoulder complex
To articulate with axial skeleton
-
Role of shoulder girdle
Movements at GH joint
Movem
ent
Muscles
pic
flexion
Originates apex of
coracoid process (from
name)
•
Inserts to midshaft
humerus on medial side
•
Coracobrachialis
○
Attaches to
supraglenoid tubercle of
glenoid fossa of scapula
•
Radial tuberosity
•
Biceps brachii long head
○
Fusiform shape
•
Inferior edge of crest of
spine of scapula, lateral
margin or acromion,
lateral border of third of
clavicle
•
Anterior fibres of deltoid
○
Clavicular head
(attaches to clavicle),
anterior surface of
medial half
•
Sternocostal head
(attaches to
costocartilages of ribs)
•
Attaches to lateral lip of
intertubercular sulcus
•
Pectoralis major
○
Extensi
on
Attaching to posterior
aspect of scapula
•
Teres major
-
Posterior aspect of
thorax
•
Comes to intertubercular
sulcus
•
Latissimus dorsi
-
Long head - to
infraglenoid tubercle
•
Triceps brachii
-
Attach to crest of spine
of scapula
•
Posterior fibres of deltoid
-
Shoulder complex muscles
Sunday, 6 May 2018
9:20 AM
wk 8 Page 1
of scapula
Screen clipping taken: 6/05/2018 9:32 AM
Abducti
on
Multipennate = greater
force produced, greater
torque
•
Middle fibres deltoid
-
Supraspinous fossa,
attaching to superior
facet of greater
tuberosity
•
Initiates first 15 degs of
abduction
•
Supraspinatus
-
Screen clipping taken: 6/05/2018 9:35 AM
Adducti
on
Pectoralis major
-
Long head of triceps brachii
-
Latissimus dorsi
-
Medial
rotatio
n
Anteiror fibres deltoid
-
Pectoralis major
-
Lat dorsi
-
Teres major
-
Subscapularis
-
Screen clipping taken: 6/05/2018 9:38 AM
Lateral
rotatio
n
Deltoid (posterior fibres)
-
Infraspinatus
-
Teres minor
-
wk 8 Page 2
Document Summary
Discuss movements which occur in the shoulder complex. Attaches to supraglenoid tubercle of glenoid fossa of scapula. Inferior edge of crest of spine of scapula, lateral margin or acromion, lateral border of third of clavicle. Clavicular head (attaches to clavicle), anterior surface of medial half. Attach to crest of spine of scapula wk 8 page 1 of scapula. Supraspinous fossa, attaching to superior facet of greater tuberosity. Attachment = medial 2/3rds of infraspinous fossa and deep fascia. Attaches to middle facet of greater tuberosity of humerus. Strengthens capsule anteriorly to prevent anterior instability, especially in overhead positions e. g. throwing overarm. Stroke (cva) - paralysis of supraspinatus, causing shoudler to drop so more prone to shoulder dislocations. Describe how the anatomy of the gh joint influences joint movement. Scapular neutral position (ideal position) wk 8 page 3. Scapular lined up with spine (not other way around) Spine of scapula in line with t2 spinous process.
