Human Structure and Functions
Which of the following is an action of the middle fibers of the deltoid muscles
Abduction
Muscles that primarily extend the elbow and supinate the forearm include all of the following except
Brachialis
Anterior deltoid action is opposed by the posterior deltoid
True
Bony stability of the elbow is full extension is enhanced by the olecranon process fitting into the olecranon fossa
True
Glenohumeral joint stability os 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 the elbow flexion is limited by the coranoid process fitting into the coranoid fossa
True
One of the functions of the supraspinatus muscle 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
The most commonly injured ligament in the elbow due to throwing is the
Ulnar collateral ligament
Which of the following is an action of the pronator teres muscle
Weak flexion of the elbow
An action common to the latissimus dorsi, teres major, and lower pectoralis major is
Adduction
Which of the following are not actions of the pectoralis minor muscle
Adduction
Muscles that primarily flex the elbow and pronate the forearm include all of the following except
Anconeus
The muscles that perform radioulnar supination include all of the following except
Anconeus
When viewed from the anatomical position which of the following is located posterior surface of the arm
Anconeus
The most common glenohumeral dislocation is
Anterior
The glenohumeral ligaments include all of the following except
Anterior glenohumeral ligaments
An agonist to the supinator muscle is the
Biceps brachialis
Tightening a screw with a screwdriver using the right hand depends significantly upon the action of the
Biceps brachialis
The muscles that perform radioulnar pronation include all of the following except
Brachialis
radioulnar supinators include all of the following except
Brachialis
Which of the following muscles is involved in both pronation and supination
Brachioradialis
An action common to the latissimus dorsi, teres major, and lower pectoralis major is
Extension
Which of the following is not an action of the brachioradialis muscle
Extension of the elbow
Lateral epicondylitis is a condition that occurs less commonly than medial epicondylitis
False
Movement at the elbow by the forearm away from the shoulder is accurately described by the term "flexion"
False
Posterior dislocation occur frequently at the glenohumeral joint
False
Supination refers to internal rotary movements of the radius on the ulna
False
The agonist muscles associated with glenohumeral diagonal abduction are the posterior deltoid, infraspinatus, teres minor, and biceps brachii
False
The clavicular head of the pectoralis major is innervated by the lateral pectoral nerve arising from C5, C6, and C7
False
The coracobrachialis muscle inserts on the coracoid process
False
The elbow joint is a hinge-type joint that allows for internal and external rotation
False
The insertion of the brachialis muscle is the coracoid process of the ulna
False
The lateral supracondylar ridge is an anatomical landmark located on the ulna
False
The origin of the pectoralis major muscle is the coracoid process of the scapular
False
The radial head sits inside of the capitulum and is held is place by the annular ligament
False
The range of motion of the glenohumeral joint in the frontal plane is 90-95 degrees for adduction and abduction
False
The scapula and clavicle serve as the proximal attachments for the muscles that flex and extend the elbow
False
The stability of the glenohumeral joint is enhanced by it significant mobility
False
The sternal head of the pectoralis major muscle is innervated by the lateral pectoral nerve arising from C8 an T1
False
Thee olecranon process is located on the medial aspect of the ulna
False
While in the anatomical position of the radius is medial with respect to the ulna
False
The insertion of the brachioradialis muscle is the proximal end of the radius at the styloid process
Flase
Which of the following is the sole action of the brachialis muscle
Flexion of the elbow
Actions of the elbow and radioulnar joints occur in all of the following planes except
Frontal
An action common to the latissimus dorsi, teres major is
Internal rotation
An action common to the posterior deltoid, teres minor, and infraspinatus is
Internal rotation
Which of the following glenohumeral motions is often restricted leading to a higher risk of injury among overhead throwers
Internal rotation
Which of the following is an action of the latissimus dorsi muscle
Internal rotation
The ligaments of the elbow includes all of the following except
Interossuus
Which of the following is not a muscle of the rotator cuff group
Intrascapularis
Which of the following is the origin of the supinator muscle
Lateral epicondyle of the humerus and neighboring posterior part of the ulna
Which of the following is considered to be an extrinsic glenohumeral muscle
Latissimus dorsi
Which of the following is considered to be extrinsic glenohumeral muscle
Latissium dorsi
Which of the following is not an origin of the latissimus dorsi muscle
Medial lip of the intertubercular groove of the humerus
Which of the following is the insertion of the latissimus dosi muscle
Medial lip of the intertubercular groove of the humerus
Which of thee following is the insertion of the pronator teres muscle
Middle 1/3 of the lateral surface of the radius
All of the following are bony landmarks located on the humerus except
Olecranon fossa
Which of the following is not an intrinsic glenohumeral muscle
Pectoralis major
Which of the following is an origin of the latissimus dorsi muscle
Posterior crest of the ilium
Which of the following is not an action of the pectotalis major muscle
Pronation
Actions of the biceps brachii include all of the following except
Pronation of the forearm
Which of the following muscle does not act in flexion of the elbow
Pronator quadratus
The radial nerve innervates all the following muscles except
Pronator teres
When viewed from the anatomical position which of the following is located anterior surface of the arm
Pronator teres
Which of the following is not a structure associated with the shoulder joint
Ribs
Flexion of the elbow and supination of the forearm occur about the ____ and _____ axes, respectively
Sagittal, longitudinal
The origin of the triceps muscle includes all of the following except
Supraglenoid tubercle above the superior lip of the glenoid fossa of the scapula
Which of the following are not anterior muscles of the shoulder joint
Supraspinatus
Which of the following muscles of the shoulder joint are located on the posterior surface of the scapula
Supraspinatus
Which of the following is not considered to be a muscle in the rotator cuff group
Teres major
Which of the following is not a factor that contributes to the predisposition for injury at the glenohumeral joint
Tight configuration of ligaments
Subscapularis action os opposed by the infraspinatus
True
Suprasoinatus action prevents superior translation of the humerus
True
The agonist muscles that perform glenohumeral flexion are the anterior deltoid and the pectoralis major
True
The coracobrachialis muscle is innervated by the musculocutaneous nerve from C5, C6, and C7
True
The deltoid muscle is innervated by the axillary nerve from C5 and C6
True
The distal attachments of the radioulnar joint muscles are located on the radius
True
The infraspinatus muscle is innervated by the suprascapular nerve from C5 and C6
True
The insertion of the biceps brachii muscle is the radial tuberosity
True
The insertion of the deltoid muscle is the humeral tuberosity on the lateral humerus
True
The insertion of the pectoralis major muscle is the flat tendon 2-3 inches wide to the outer lip of the intertubercular groove of the humerus
True
The insertion of the triceps brachii muscle is the olecranon process of the ulna
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 surfave of the clavicle
True
The origin of the pectoralis major muscle includes the portion of the sternum adjacent to the costal cartilages of the first 6 ribs
True
The pronator teres is innervated by the median nerve
True
The radial collateral ligament provides lateral stability to the elbow and is rarely injured
True
The rotator cuff muscle group includes the subscapularis, supraspinatus, infraspinatus, and teres minor muscles
True
The teres minor muscle is innervated by the axillary nerve from C5 and C6
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 antahonist muscle
True
When the arm is held in the anatomical position the radial tuberosity is is close proximity to lateral side of the ulna
True
Actions of the brachioradialis muscle include all of the following except
Weak flexion of the shoulder
