Back, Shoulder and Humerus Flashcards
Label the structures in the image
- Clavicle
- Acromioclavicular Joint
- Glenohumeral Joint
- Scapula
- Rib
- Humerus
- Sternoclavicular Joint
- Sternum
Label the bones in the image
- Clavicle
- Scapula
- Rib
- Humerus
Identify the bones of the pectoral girdle
clavicle 1 and scapula 4
1
Suprascapular Notch
2
Superior Angle
3
Medial Border or vertebral border
4
Lateral Border or axillary border
5
Coracoid process
6
Acromion
7
Glenoid Cavity
8
Inferior angle
9
Subscapular fossa
10
Superior border
11
Spine
12
Infraspinous fossa
13
Lateral Angle
14
Supraspinous fossa
1
Conoid tubercle
2
Impression for the costoclavicular ligament
3
Acromial end
4
Sternal end
5
Trapezoid line
6
Subclavian groove
What is the pectoral girdle?
Group of muscles that ORIGINATE somewhere on the posterior AXIAL SKELETON and produce ACTIONS at the SCAPULA
Label the POSTERIOR and ANTERIOR muscles that make up the pectoral girdle
Posterior: trapezius, lavator scapulae, rhomboid major AND minor
Anterior: Subclavious, pectoralis MINOR, and serratus anterior
Label the POSTERIOR muscles that are part of the pectoral girdle
Trapezius 11, 2 & 3, levator scapula 7, rhomboid minor 8, rhomboid major 9
Label the anterior muscles of the pectoral girdle
- Subclavius
- Pectoralis minor
- Serratus anterior
(2. Pectoralis major was labeled only for orientation, it’s not an anterior pectoral girdle muscle bc it inserts on the humerus not scapula)
Label the posterior and anterior muscles of the pectoral girdle in the image. Which muscles cannot be seen?
- Lavator scapulae
- Descending superior trapezious
- Subclavius
- Teres minor
- Serratus anterior
*Can’t see rhomboid minor and major*
Origin, insertion, action and innervation of the trapezius
O - Superior nuchal line, external occiptal protuberance, ligamentum nuchae, spinous process C7 to T1-T12 vertebrae (varies per body)
I - Lateral 1/3rd of clavicle, acromion & spine of scapula
A - Elevates and retracts scapula (might also depress but it wasn’t in ppt)
Inn- Accessory n. (CN XI)*
*Only muscle innervated by a cranial nerve
Origin, insertion, action and innervation of the levator scapulae
O - Transverse process of C1-C4 vertebrae
I - Vertebral (medial) border of scapula near superior angle
A - Elevates scapula
Inn - Dorsal scapular n. (C4, C5)
Origin, insertion, action and innervation of the rhomboid minor
O - Spinous process C7 & T1 vertebrae
I - Vetebral (medial) border of scapula
A - Retracts scapula
Inn - Dorsal scapular n (C5)
Origin, insertion, action and innervation of the rhomboid major
O - Spinous process T2 - T5 vertebrae
I - Vertebral (medial) border of scapula (inferior to scap. spine)
A - Retracts scapula
Inn - Dorsal scapular n (C4, C5)
Origin, insertion, action and innervation of pectoralis minor
O - Anterior surface of ribs 3-5
I - Coracoid process of the scapula
A - Protracts scapula (punching) and elevates ribs to asssist in inhalation
Inn - Medial AND Lateral pectoral nerve
Origin, insertion, action and innervation of serratus anterior
O - Lateral surface of ribs 1-8
I - Anterior surface of medial border of the scapula
A - Holds scapula against thoracic wall and Protracts (punch) scapula
Inn - Long thoracic nerve
List the different movements of the scapula
- Elevation / Depression
- Protraction (Abduction) / Retraction (Adduction)
- Upward rotation / downward rotation
Demonstrate elevation / depression of the scapula
Gliding the shoulders up towards the ear and then back down
What muscles elevate and depress the scapula?
Elevate: descending superior trapezius (11) and levator scapulae (7)
Depression: ascending inferior trapezius (3) (not stated in ppt)
Demonstrate protraction / retraction of the scapula
Protraction: rounding the shoulder blades forward like
PUNCHING
retraction: pinching the shoulder blades towards each other
What muscles aid in protraction and retraction of the scapula?
Protraction: serratus anterior and pectoralis minor (not pictured)
Retraction: rhomboid major / minor, transverse middle trapezius
Demonstrate upward / downward rotation of the scapula
Upward: lift the arms up and scapula will follow
Downward: return arms downward to side
What muscles aid in upward and downward rotation of the scapula?
Upward: Trapezius (superior and inferior) and serratus anterior
Downward: rhomboid major and minor, lavator scapulae, pectoralis minor, and Latissimus dorsi (not pictured)

What 4* joints make up the shoulder joint?
- Sternoclavicular joint
- Acromioclavicular joint
- Glenohumeral joint
*4. Scapulothoracic joint
* not a true “anatomical” joint
In the upper body, what joint is the only articulation between the upper extremity and the axial skeleton?
Sternoclavicular joint (sternum and clavicle)
1
Articulate disk (capsule and ligaments removed anteriorly to expose joint)
2
Interclavicular ligament
3
Anterior Sternoclavicular ligament
4
Costoclavicular ligament
5
Clavicular notch
6
First costal cartilage
7
Manubrium of sternum
8
Attachment site for rib II
9
Sternal angle
Label the anterior ligaments of the Sternoclavicular joint
- Interclavicular ligament
- Anterior sternoclavicular ligaments
- Costoclavicular ligament
Label the posterior ligaments of the sternoclavicular joint
- Posterior Sternoclavicular ligaments
- Interclavicular ligament
- Costoclavicular ligament
What ligaments make up the acromioclavicular joint of the shoulder?
- Acromioclavicular ligament
- Coracoclavicular ligament (trapezoid ligament and the conoid ligament)
1
Acromioclavicular ligament
2
Coracoclavicular ligament
3
Trapezoid ligament
4
Conoid ligament
What is the main purpose of the Coracoclavicular joint?
Stabilizing the acromioclavicular joint *Coracoclavicular are stronger extrinsic ligaments
What ligaments make up the glenohumeral joint of the shoulder?
- Coracohumeral ligament
- Coracoacromial ligament
- Glenohumeral ligament
- Transverse ligament*
Label 1 & 2
- Glenoid cavity
- Glenoid labrum = layer of firbocartiledge within the Glenoid cavity
Label the skeletal structures 4-7
- Glenoid cavity
- Lesser tubercle of humerus
- Greater tubercle of humerus
- Coracoid process
1
Articular capsule = surrounds Glenohumeral joint from Glenoid cavity to anatomical neck of humerus
2
Glenohumeral ligaments
3
Coracohumeral ligament
1
Transverse humeral ligament
2
Coracohumeral ligament
3
Superior Glenohumeral ligament
4
Middle Glenohumeral ligament
5
Inferior Glenohumeral ligament
1
Acromioclavicular ligament
2
Coracoacromial ligament
3
Coracoclavicular ligament
Identify the bone
Anterior right humerous
A
Greater tubercle
B
Lesser tubercle
C
Intertubercular sulcus
D
Lateral epicondyle
E
Radial fossa
F
Capitulum
G
Trochlea
H
Medial epicondyle
I
Coronoid fossa
J
Body
K
Deltoid tuberocity
Identify the bone
Right Posterior humerus
A
Head
B
Greater tubercle
C
Lateral epicondyle
D
Body
E
Deltoid tuberocity
F
Medial epicondyle
G
Olecranon fossa
1
Medial Supra-epicondyle ridge
2
Lateral supra-epicondyle ridge
3
Radial fossa
4
Coronoid fossa
5
Lateral epicondyle for extensors
6
Medial epicondyle for flexors
7
Capitulum
8
Trochlea
9
Olecranon fossa
10
Lateral epicondyle
11
Extensors
12
Anconeus
13
Trochlea
14
Medial epicondyle for
15
Flexors
16
Ulnar nerve
What is the shoulder girdle?
Group of muscles that all ORIGINATE on the SCAPULA and produce ACTIONS at the GLENOHUMERAL JOINT
What muscles make up the shoulder girdle?
Rotator cuff muscles (subscapularis, Supraspinatus, Infraspinatus, Teres minor)
Deltoid and Teres major
1
Spine of scapula
2
Deltoid
3
Supraspinatus
4
Infraspinatus
5
Teres minor
6
Teres major
What is this muscle
Subscapularis (anterior shoulder view)
What is the rotator cuff?
A group of muscles that ORIGINATES somewhere on the SCAPULA and produces ACTIONS at the GLENOHUMERAL JOINT
List the rotator cuff muscles
Supraspinatus (1), subscapularis (2), infraspinatus (3), Teres minor (4)
1
Supraspinatus m
2
Infraspinatus m
3
Teres minor
4
Subscapularis
Origin, insertion, action and innervation of subscapularis m
O - subscauplar fossa of scaupla
I - lesser tubercle of humerus
A - Medially (internally) rotates arm (shoulder)
Inn - Upper & lower subscapularis n.
Origin, insertion, action and innervation of Supraspinatus
O - Supraspinous fossa of scapula
I - Greater tubercle of humerus
A - Abducts arm (shoudler)
Inn - Suprascapular n (C5 &C6)
Origin, insertion, action and innervation of Infraspinatus
O - Infraspinous fossa of scapula
I - Greater tubercle of humerus
A - Laterally (externally) rotates arm (shoudler)
Inn - Suprascapular n. (C5 &C6)
Origin, insertion, action and innervation of Teres minor
O - Lateral border of scapula
I - Greater tubercle of humerus
A - Laterally (externally) rotates arm (shoudler)
Inn - Axillary n.
Demonstrate Abduction of the shoudler
Raising arm out to the side
Demonstrate lateral (external) rotation of the arm
Elbows tucked at side, forearms swing out
Demonstrate medial (internal) rotation of the arm
Bringing your hand to your opposite hip with your elbow bent at 90 degrees
Origin, insertion, action and innervation of deltoid
O - later 1/3rd of clavicle, acromion, & spine of scapula
I - Deltoid tuberoisiy of hermous
A -
Anterior part: flexes arm (shoudler) and medially (internally) rotates arm
Middle part: Abducts arm
Posterior part: Extends arm and laterall (externally) rotates arm
Inn - Axillary nerve
Origin, insertion, action and innervation of Teres major
O - Inferior angle of scapula
I - Lesser tubercle of humerous
A - Adducts, Extends, and Medially (internally) rotates arm
Inn - lower subscapular n.
Origin, insertion, action and innervation of the pectoralis major muscle
O - Medial half of clavicle, sternum, costal cartiledge of ribs 2-6
I - Crest of greater tubercle of humerus
A - Adducts arm (Shoulder) and medially (internally) rotates arm
Inn - medial AND lateral pectoral nerve
Demonstrate flexion / extension of the arm (shoulder)
Flexion: raise arm out in front
Extension: lift arms behind, perpendicular to back
Demonstrate adduction / abduction of arm (shoulder)
Abduction: raise arm out to the side of the body
Adduction: return arms to the side of the body
What special areas of the back can be seen in this photo?
- Quadrangular space
- Triangular space
- Triangular interval
Identify the quadrangular space in the photo
Label the borders of the quadrangular space
- Teres major
- Long head triceps brachii
- Lateral head triceps brachii (OR Lateral shaft of humerous)
- Teres minor
Label the borders of the triangular space
Teres minor
Teres major
Long head triceps brachii
Label the borders of the triangular interval
Long head triceps brachii
Lateral head triceps brachii (OR Lateral shaft of humerous)
Teres major