Exam 2 True/False Ch. 4,5,6

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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


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