Exam 2 True/False Ch. 4,5,6
The pronator teres is innervated by the median nerve
True
The acromioclavicular joint has more total range of possible than the sternoclavicular joint
False
The insertion of the deltoid muscle is the humeral tuberosity on the lateral humerus
False
The levator scapulae muscles is innervated by the dorsal scapular nerve C5 and branches of C6
False
The location of the pectoralis minor muscles is such that the muscle may be palpated with little difficulty
False
The origin of the pectoralis major muscle is the coracoid process of the scapula
False
The scapulothoracic joint consists of the bony articulation of the anterior scapular moving directly against the posterolateral ribs
False
The stability of the glenohumeral joint is enhanced by its significant mobility
False
The sternoclavicular joint is supported anteriorly by the costoclavicular ligament
False
The radial head sits inside of the capitulum and is held in place by the annular ligament
False (Does not sit inside, just has contact with)
The levator scapulae muscles is responsible for upward rotation of the inferior angle of the scapula
False (Elevates the medial margin of the scapula)
The origin of the rhomboid muscles is the spinous processes of the last cervical (C7) and the first seven thoracic vertebrae (T1-7)
False (First 5 thoracic vertebrae not first 7)
The insertion of the brachioradialis muscle is the proximal end of the radius at the styloid process
False (Lateral surface of the distal end of the radius)
The insertion of the brachialis muscles is the coracoid process of the ulna
False (coronoid process)
The scapula and clavicle serve as the proximal attachments for the muscles that flex and extend the elbow
False (do not flex/extend, they pronate/supinate)
The pectoralis minor can perform adduction, downward rotation, or depression when activated
False (does not perform adduction, performs abduction)
The elbow is a hinge-type joint that allows for internal and external rotation
False (flexion/extension not internal/external rotation)
The sternal head of the pectoralis major muscle is innervate by the lateral pectoral nerve arising from C8 and T1
False (innervated by medial pectoral nerve
The insertion of the pectoralis minor is the coranoid process of the scapula
False (insertion is the coracoid process)
The coracobrachialis muscle inserts on the coracoid process
False (inserts on humeral shaft)
The lateral supracondylar ridge is an anatomical landmark locate on the ulna
False (located on the humerus)
The origin of the pectoralis major muscle includes the anterior surface of the costal cartilages of the first six ribs
False (medial half of surface of the clavicle)
The origin of serratus anterior is the surfaces of the upper 7 ribs at the side of the chest
False (nine ribs)
The agonist muscles associated with glenohumeral diagonal abduction are the posterior deltoid, infraspinatus, teres minor, and biceps brachii
False (not biceps brachii, triceps brachii)
Movement at the elbow by the forearm away from the shoulder is accurately described by the term "flexion"
False (not flexion, it is extension)
Lateral epicondylitis is a condition that occurs less commonly than medial epicondylitis
False (occurs more commonly)
The origin of the levator scapulae muscle is the spinous processes of the upper four cervical vertebrae (C1-4)
False (origin is transverse process of upper cervical spine)
Posterior dislocations occur frequently at the glenohumeral joint
False (posterior dislocation is very rare)
The olecranon process is located on the medial aspect of the ulna
False (proximal aspect of the ulna)
While in the anatomical position the radius is medial with respect to the ulna
False (radius is lateral to the ulna in anatomical position)
Supination refers to internal rotary movements of the radius on the ulna
False (supination refers to external rotation, not internal)
Anterior deltoid action is apposed by the posterior deltoid
True
Bony stability of the elbow in full extension is enhanced by the olecranon process fitting into the olecranon fossa
True
Glenohumeral joint stability is enhanced by the glenoid labrum
True
Medial epicondylitis is also known as golfer's elbow
True
Motion of the elbow primarily involves movement between articular surfaces of the humerus and ulna
True
Normal bony limitation of elbow flexion is limited by the coranoid process fitting into the coranoid fossa
True
One of the functions of the supraspinatus muscles is to stabilize the humeral head in the glenoid fossa
True
Positioning the forearm in pronation reduces the effectiveness of the biceps brachialis in flexing the elbow
True
Subscapularis action is opposed by the infraspinatus
True
Supraspinatus action prevents superior translation of the humerus
True
The actions of serratus anterior include abduction and upward rotation
True
The agonist muscles that perform glenohumeral flexion are the anterior deltoid and the pectoralis major
True
The clavicular head of the pectoralis major is innervated by the lateral pectoral nerve arising from C5, C6, and C7
True
The coracobrachialis muscles is innervated by the musculocutaneous nerve from C5, C6, and C7
True
The coracoclavicular ligament is particularly important in providing stability to the acromioclavicular joint
True
The deltoid muscle is innervated by the axillary nerve from C5 to C6
True
The distal attachments of the radioulnar joint muscles are located on the radius
True
The dorsal scapular nerve (C5) branch of the brachial plexus serves as the innervation for the rhomboids
True
The infraspinatus muscle is innervated by the suprascapular nerve from C5 to C6
True
The innervation of the trapezius muscle is the accessory nerve (cranial nerve XI) and branches of (C3-4)
True
The insertion of the biceps brachii muscle is the radial tuberosity
True
The insertion of the levator scapulae is the transverse processes of the upper 4 cervical vertebrae
True
The insertion of the pectoralis major muscle is the flat tendon 2-3 inches wide to the outer lip of the intertubular groove of the humerus
True
The insertion of the serratus anterior muscle is the anterior aspect of the whole length of the medial border of the scapula
True
The insertion of the triceps brachii muscles is the olecranon process of the ulna
True
The medial border of the scapula above the scapular spine is the insertion point of the levator scpaulae
True
The most palpable shoulder girdle muscle is the trapezius
True
The nerve that innervates the serratus anterior muscle is the long thoracic nerve (C5-7)
True
The origin of the biceps brachii muscle includes the supraglenoid tubercle above the superior lip of the glenoid fossa
True
The origin of the deltoid muscle includes the anterior lateral third of the clavicle and the lateral portion of the acromion process
True
The origin of the pectoralis major muscle includes the medial half of the anterior surface of the clavicle
True
The origin of the pectoralis major muscle includes the portion of the sternum adjacent to the costal cartilage of the first six ribs
True
The origin of the subclavius is the superior aspect of the first rib at its junction with its costal cartilage
True
The radial collateral ligament provides lateral stability to the elbow and is rarely injured
True
The range of motion of the glenohumeral joint in the frontal plane is approximately 90-95 degrees for adduction and abduction
True
The rotator cuff muscle group includes the subscapularis, supraspinatus, infraspinatus, and teres minor muscles
True
The serratus anterior performs abduction in the transverse plane
True
The teres minor muscle is innervated by the axillary nerve from C5 to C6
True
The trapezius can perform adduction in the transverse plane when activated
True
The ulna is much larger proximally than the radius
True
When attempting extreme external rotation the total shoulder range of motion is enhanced by scapula adduction
True
When performing a pushup the biceps brachii is considered to be an antagonist muscle
True
When the arm is held in the anatomical position the radial tuberosity is in close proximity to lateral side of the ulna
True
