Lab 7 - Musculoskeletal System II Flashcards
List the joints of the pectoral (shoulder) girdle
Acromioclavicular joint and glenohumeral joint
List the joints in the elbow region
Elbow joint (humerus articulates with ulna and radius) and radioulnar joint
List the joints of the wrist
Radiocarpal joint, intercarpal joints, carpometacarpal joints
Differentiate between abduction and adduction
Abduction: moving limb(s) away from the midline
Adduction: moving limb(s) toward the midline
Differentiate between protraction and retraction
Protraction: pulling forward
Retraction: pulling backward
Differentiate between supinate and pronate
Supinate: Turning upward
Pronate: Turning downward
Name the origin and insertion for pectoralis major
Origin (medial): Clavicle, cartilage of ribs 1-6, sternum
Insertion (lateral): intertubercular groove and sulcus of the humerus
Name the origin and insertion for deltoid
Origin (proximal): Clavicle and acromion process of the scapula
Insertion (distal): Deltoid tuberosity of the humerus
Name the origin and insertion for latissimus dorsi
Origin (medial): Spinus processes of T6-L5, iliac crest, and ribs 9-12
Insertion (lateral): Intertubercular groove of the humerus
Name the origin and insertion for biceps brachii
Origin (proximal): Coracoid process and glenoid cavity of scapula
Insertion (distal): Radial tuberosity
Name the origin and insertion of triceps brachii
Origin (proximal): Posterior humerus and glenoid cavity of scapula
Insertion (distal): Olecranon process of ulna
Which muscle is responsible for abduction of arm (prime mover)? Describe how it does this.
Deltoid
-Its anterior fibers flex the arm, and its posterior fibers extend the arm
Which muscle is responsible for flexion and adduction of the arm (prime mover)?
Pectoralis major
Which muscle is responsible for extension and adduction of the arm (prime mover)?
Latissimus dorsi
What muscle is the synergist to the latissimus dorsi?
Teres major
What stabilizes the shoulder joint and rotates the humerus?
The rotator cuff muscles
Name the rotator cuff muscles
Supraspinatus, infraspinatus, teres minor, and subscapularis
What protracts and laterally pulls scapulae forward?
Serratus anterior and pectoralis minor
What elevates the scapulae?
Trapezius and levator scapulae
What retracts the scapulae?
Trapezius and latissimus dorsi
What is responsible for flexion and supination of the forearm?
Biceps brachii
What is responsible for flexion of the forearm only?
Brachialis and brachioradialis
What is responsible for pronation [acts on elbow joint]?
Pronator teres
What is responsible for extension of the forearm?
Triceps brachii
What is responsible for supination [acts on elbow joint]?
Supinator
What 4 things are responsible for flexion of the wrist?
1) Palmaris longus
2) Flexor carpi ulnaris
3) Flexor carpi radialis
4) Flexor digitorum superficialis
What 4 things are responsibile for extension of the wrist?
1) Extensor carpi radialis longus
2) Extensor carpi radialis brevis
3) Brachioradialis
4) Extensor carpi ulnaris
What is responsible for flexion of the fingers?
Flexor digitorum superficialis
What is responsible for extension of the fingers?
Extensor digitorum
Flexors can be found on the ____ side of the wrist, while extensors can be found on the ____ side of the wrist
anterior; posterior
From lateral to medial in anatomical position, what is the order of the anterior forearm/wrist muscles?
1) Brachioradialis
2) Pronator teres (slightly superior to brachioradialis too)
3) Flexor digitorum superficialis (located deep and in most of forearm)
4) Flexor carpi radialis
5) Palmaris longus
From lateral to medial in anatomical position, what is the order of the posterior forearm/wrist muscles?
1) Brachioradialis
2) Extensor carpi radialis longus
3) Extensor carpi radialis brevis
4) Extensor digitorum
5) Extensor carpi ulnaris
From superior to inferior in anatomical position, what is the order of the posterior pectoral/shoulder girdle muscles?
1) Levator scapulae
2) Rhomboid minor (medial) and supraspinatus (lateral)
3) Rhomboid major (medial) and infraspinatus (lateral)
4) Teres minor
5) Teres major
6) Seratus anterior
And the trapezius and latissmus dorsi are large muscles superficial to the muscles listed above
From lateral to medial in anatomical position, what is the order of the anterior pectoral/shoulder girdle muscles?
1) Suprascapularis (deep) and deltoid (superficial)
2) Pectoralis major
Where is the brachialis muscle located?
Underneath the biceps brachii; biceps brachii is the most superficial muscle of the anterior brachial region
The head of the humerus is pointed in a ____ direction in anatomical position
medial
List the three phalanx (finger) bones in order
1) Distal phalanx
2) Middle phalanx
3) Proximal phalanx
What are the two bones found in the pollex?
1) Distal phalanx
2) Proximal phalanx
List the three carpal bones we need to know in order from lateral to medial
1) Trapezium
2) Scaphoid
3) Lunate
List the metacarpal bones in order from lateral to medial
I, II, III, IV, V
The radius is _____ to the ulna
lateral
