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PRactice lab 2 muscles Flashcards

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1
Q

What is the origin of the Pectoralis major?

A

Clavicle, Sternum, Ribs

The Pectoralis major is a key muscle involved in movements of the shoulder joint.

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2
Q

What is the insertion point of the Pectoralis major?

A

Humerus: Intertubercular sulcus

This insertion allows the muscle to flex, adduct, and medially rotate the humerus.

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3
Q

What actions does the Deltoid perform?

A

Flex, Medially Rotate, Extend, Laterally Rotate, Abduct Humerus

The Deltoid has three portions: anterior, lateral, and posterior, each responsible for different actions.

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4
Q

What is the primary action of the Serratus anterior?

A

Protract Scapula; Upwardly Rotate Scapula

Essential for movements such as pushing and reaching overhead.

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5
Q

What is the origin of the Coracobrachialis?

A

Scapula: Coracoid process

This muscle assists in flexing and adducting the humerus.

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6
Q

What actions does the Trapezius perform?

A

Elevate, Depress, Retract, Upwardly Rotate Scapula

The Trapezius is crucial for shoulder and neck movements.

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7
Q

What is the origin of the Latissimus dorsi?

A

Vertebrae, Ribs, Ilium

This muscle is involved in adduction, extension, and medial rotation of the humerus.

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8
Q

What is the main function of the Erector spinae?

A

Extend Vertebral Column

This group of muscles helps maintain posture and supports the spine.

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9
Q

What is the action of the Palmaris longus?

A

Flex Wrist

It also helps in tensing the palmar aponeurosis.

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10
Q

Fill in the blank: The _______ flexes the wrist and adducts the wrist.

A

Flexor carpi ulnaris

This muscle originates from the medial epicondyle of the humerus.

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11
Q

What is the insertion of the Flexor digitorum superficialis?

A

Middle phalanges

It plays a role in flexing both the wrist and fingers.

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12
Q

What is the action of the Flexor pollicis longus?

A

Flex Thumb

This muscle specifically targets the thumb’s distal phalanx.

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13
Q

What is the origin of the Extensor digitorum?

A

Humerus: Lateral epicondyle

It is responsible for extending the wrist and fingers II-V.

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14
Q

True or False: The Biceps brachii has two heads.

A

True

The long head and short head originate from different parts of the scapula.

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15
Q

What is the action of the Brachialis?

A

Flex Elbow

This muscle is a primary flexor of the elbow joint.

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16
Q

Fill in the blank: The _______ extends the elbow.

A

Triceps brachii

The Triceps brachii has three heads: long, lateral, and medial.

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17
Q

What is the function of the Supinator?

A

Supinate Elbow

It assists in rotating the forearm to turn the palm upwards.

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18
Q

What is the origin of the Pronator teres?

A

Humerus & Ulna

This muscle helps in pronating the elbow.

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19
Q

What is the origin of the Pectoralis major?

A

Clavicle, Sternum, Ribs

The Pectoralis major is a large muscle in the chest responsible for various movements of the humerus.

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20
Q

What is the insertion point of the Pectoralis major?

A

Humerus: Intertubercular sulcus

The intertubercular sulcus is a groove on the humerus where the Pectoralis major attaches.

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21
Q

What actions does the Pectoralis major perform?

A

Flex, Adduct, and Medially Rotate Humerus

These actions contribute to movements like bringing the arm towards the body and rotating it inward.

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22
Q

What is the origin of the Deltoid muscle?

A

Scapula: Acromion & Spine, Clavicle

The Deltoid muscle is responsible for the rounded contour of the shoulder.

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23
Q

What are the actions of the Deltoid muscle?

A

Flex and Medially Rotate Humerus (anterior portion); Extend and Laterally Rotate Humerus (posterior portion); Abduct Humerus (lateral portion)

The Deltoid muscle has multiple functions depending on which portion is engaged.

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24
Q

What is the action of the Serratus anterior?

A

Protract Scapula; Upwardly Rotate Scapula

This muscle is crucial for movements of the shoulder and stability of the scapula.

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25
What is the function of the Coracobrachialis muscle?
Adduct and Flex Humerus ## Footnote The Coracobrachialis assists in flexing the arm at the shoulder joint.
26
What actions does the Pectoralis minor muscle perform?
Protract Scapula; Depress Scapula ## Footnote The Pectoralis minor helps in moving the scapula forward and downward.
27
What are the origins of the Trapezius muscle?
Occipital bone, Vertebrae, Nuchal ligament ## Footnote The Trapezius muscle spans the upper back and neck.
28
What actions does the Trapezius muscle perform?
Elevate Scapula; Depress Scapula; Retract Scapula; Upwardly Rotate Scapula ## Footnote The Trapezius is involved in various movements of the shoulder girdle.
29
What is the origin of the Latissimus dorsi?
Vertebrae, Ribs, Ilium ## Footnote This large muscle of the back plays a key role in arm movements.
30
What actions does the Latissimus dorsi perform?
Adduct, Extend, and Medially Rotate Humerus ## Footnote It is crucial for actions like pulling and lifting.
31
What is the function of the Erector spinae muscles?
Extend Vertebral Column ## Footnote These muscles are essential for maintaining posture and extending the spine.
32
What is the origin of the Palmaris longus?
Humerus: Medial epicondyle ## Footnote This muscle is involved in wrist flexion.
33
What is the action of the Palmaris longus muscle?
Flex Wrist ## Footnote It helps in flexing the wrist and tensing the palmar aponeurosis.
34
What is the origin of the Flexor carpi ulnaris?
Humerus: Medial epicondyle ## Footnote This muscle is located on the ulnar side of the forearm.
35
What actions does the Flexor carpi ulnaris perform?
Flex Wrist; Adduct Wrist ## Footnote It aids in bending the wrist and moving it toward the body.
36
What is the origin of the Flexor carpi radialis?
Humerus: Medial epicondyle ## Footnote This muscle is found on the radial side of the forearm.
37
What actions does the Flexor carpi radialis perform?
Flex Wrist; Abduct Wrist ## Footnote It assists in bending the wrist and moving it away from the body.
38
What is the origin of the Flexor digitorum superficialis?
Humerus: Medial epicondyle ## Footnote This muscle is responsible for flexing the fingers.
39
What actions does the Flexor digitorum superficialis perform?
Flex Wrist and Fingers ## Footnote It allows for bending both the wrist and the fingers.
40
What is the origin of the Flexor digitorum profundus?
Ulna ## Footnote This muscle plays a role in deeper finger flexion.
41
What actions does the Flexor digitorum profundus perform?
Flex Wrist and Fingers ## Footnote It allows for greater flexion of the fingers compared to the superficialis.
42
What is the origin of the Flexor pollicis longus?
Radius ## Footnote This muscle is specifically for thumb movement.
43
What action does the Flexor pollicis longus perform?
Flex Thumb ## Footnote It is essential for gripping and pinching actions.
44
What is the origin of the Extensor digitorum?
Humerus: Lateral epicondyle ## Footnote This muscle extends the fingers and wrist.
45
What actions does the Extensor digitorum perform?
Extend Wrist and Fingers ## Footnote It is crucial for opening the hand and extending the wrist.
46
What is the origin of the Extensor carpi ulnaris?
Humerus: Lateral epicondyle ## Footnote This muscle helps in wrist movement.
47
What actions does the Extensor carpi ulnaris perform?
Extend Wrist; Adduct Wrist ## Footnote It assists in extending the wrist and moving it toward the body.
48
What is the origin of the Extensor carpi radialis longus?
Humerus: Lateral epicondyle ## Footnote This muscle is involved in the movement of the wrist.
49
What actions does the Extensor carpi radialis longus perform?
Extend Wrist; Abduct Wrist ## Footnote It helps in extending the wrist and moving it away from the body.
50
What is the origin of the Extensor carpi radialis brevis?
Humerus: Lateral epicondyle ## Footnote This muscle is similar to the longus but shorter in length.
51
What actions does the Extensor carpi radialis brevis perform?
Extend Wrist; Abduct Wrist ## Footnote It assists in extending the wrist and moving it laterally.
52
What is the origin of the Pronator quadratus?
Distal Ulna ## Footnote This muscle is located near the wrist and aids in pronation.
53
What is the action of the Pronator quadratus?
Pronate Elbow ## Footnote It rotates the forearm such that the palm faces downward.
54
What is the origin of the Biceps brachii - long head?
Scapula: Glenoid cavity (superior) ## Footnote This part of the biceps originates from the shoulder area.
55
What is the insertion point of the Biceps brachii - long head?
Radius: Radial tuberosity ## Footnote This is where the biceps attaches to the radius.
56
What actions does the Biceps brachii - long head perform?
Flex Elbow; Supinate Elbow ## Footnote It is involved in bending the elbow and rotating the forearm.
57
What is the origin of the Biceps brachii - short head?
Scapula: Coracoid process ## Footnote This part of the biceps originates from a different area of the scapula.
58
What is the insertion point of the Biceps brachii - short head?
Radius: Radial tuberosity ## Footnote Similar to the long head, it attaches at the radial tuberosity.
59
What actions does the Biceps brachii - short head perform?
Flex Elbow; Supinate Elbow ## Footnote It shares similar functions with the long head.
60
What is the action of the Brachialis muscle?
Flex Elbow ## Footnote This muscle is a primary flexor of the elbow.
61
What is the action of the Brachioradialis muscle?
Flex Elbow ## Footnote It assists in elbow flexion, particularly in a neutral position.
62
What is the origin of the Triceps brachii - long head?
Scapula: Glenoid cavity (inferior) ## Footnote This part of the triceps originates from the lower part of the shoulder blade.
63
What is the insertion point of the Triceps brachii - long head?
Ulna: Olecranon ## Footnote The olecranon is the bony prominence of the elbow.
64
What actions does the Triceps brachii - long head perform?
Extend Elbow ## Footnote It is primarily responsible for straightening the elbow.
65
What is the origin of the Triceps brachii - lateral head?
Proximal Humerus ## Footnote This part of the triceps originates from the upper arm bone.
66
What is the insertion point of the Triceps brachii - lateral head?
Ulna: Olecranon ## Footnote Similar to the long head, it attaches at the olecranon.
67
What actions does the Triceps brachii - lateral head perform?
Extend Elbow ## Footnote It contributes to the extension of the elbow.
68
What is the origin of the Triceps brachii - medial head?
Humerus: Shaft ## Footnote This part of the triceps originates from the body of the humerus.
69
What is the insertion point of the Triceps brachii - medial head?
Ulna: Olecranon ## Footnote Like the other heads, it also attaches at the olecranon.
70
What actions does the Triceps brachii - medial head perform?
Extend Elbow ## Footnote It aids in extending the elbow along with the other heads.
71
What is the action of the Anconeus muscle?
Extend Elbow ## Footnote This small muscle assists in elbow extension.
72
What is the origin of the Supinator?
Humerus & Ulna ## Footnote This muscle assists in supinating the forearm.
73
What action does the Supinator perform?
Supinate Elbow ## Footnote It rotates the forearm so the palm faces upward.
74
What is the origin of the Pronator teres?
Humerus & Ulna ## Footnote This muscle is involved in pronating the forearm.
75
What action does the Pronator teres perform?
Pronate Elbow ## Footnote It rotates the forearm to turn the palm downward.

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