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BIO2300 Unit 3 > Muscles UL > Flashcards

Muscles UL Flashcards

1
Q

Compartment, Action, Innervation

Pectoralis Minor

A

Pectoralis Minor

Compartment
Anterior Axioappendicular

Action
Protracts and depresses scapula

Innervation
Medial pectoral nerve (C8–T1)

Proximal Attachment
Ribs 3-5
Distal Attachment
Coracoid Process

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2
Q

Compartment, Action, Innervation

Serratus Anterior

A

Serratus Anterior

Compartment
Anterior Axioappendicular

Action
Agonist in scapula protraction; superiorly rotates scapula (so glenoid cavity moves superiorly); stabilizes scapula

Innervation
Long thoracic nerve (C5–C7)

Proximal Attachment
Ribs 1–8, anterior and superior margins
Distal Attachment
Scapula (medial border, anter. surface)

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3
Q

Compartment, Action, Innervation

Subclavius

A

Subclavius

Compartment
Anterior Axioappendicular

Action
Depresses and stabilizes clavicle

Innervation
Nerve to subclavius (C5–C6)

Proximal Attachment
Rib 1
Distal Attachment
Clavicle (inferior surface)

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4
Q

Compartment, Action, Innervation

Pectoralis Major

A

Pectoralis Major

Compartment
Anterior Brachial

Action
Agonist of arm flexion; also adducts and medially rotates arm

**Innervation**
Lateral pectoral (C5–C7) and medial pectoral (C8–T1) nerves

Proximal Attachment
Clavicle, Ribs (costal cart. 2-6), Sternum
Distal Attachment
Humerus (lateral part of intertubercular groove)

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5
Q

Compartment, Action, Innervation

Coracobrachialis

A

Coracobrachialis

Compartment
Anterior Brachial

Action
Adducts and flexes arm

**Innervation**
Musculocutaneous nerve (C5–C6 nerve fibers)

Proximal Attachment
Coracoid Process
Distal Attachment
Humerus (medial shaft)

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6
Q

Compartment, Action, Innervation

Biceps Brachii - Long head

A

Biceps Brachii - Long head

Compartment
Anterior Brachial

Action
Flexes forearm, powerful supinator of forearm; Long head also flexes arm

**Innervation**
Musculocutaneous nerve (C5–C6 nerve fibers)

Proximal Attachment
Scapula (Supraglenoid Tubercle)
Distal Attachment
Radial Tuberosity, Bicipital Aponeurosis

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7
Q

Compartment, Action, Innervation

Biceps Brachii - Short head

A

Biceps Brachii - Short head

Compartment
Anterior Brachial

Action
Flexes forearm, powerful supinator of forearm

**Innervation**
Musculocutaneous nerve (C5–C6 nerve fibers)

Proximal Attachment
Coracoid Process
Distal Attachment
Radial Tuberosity, bicipital apon.

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8
Q

Compartment, Action, Innervation

Brachialis

A

Brachialis

Compartment
Anterior Brachial

Action
Primary flexor of forearm

**Innervation**
Musculocutaneous nerve (C5–C6 nerve fibers)

Proximal Attachment
Humerus (distal anterior)
Distal Attachment
Ulna (tuberosity and coronoid proc.)

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9
Q

Compartment, Action, Innervation

Flexor Pollicis Longus

A

Flexor Pollicis Longus

Compartment
Anterior Deep Forearm

Action
Flexes MP joint of thumb, IP joint of thumb; weakly flexes wrist

**Innervation**
Median nerve (C6–C7 nerve fibers)

Proximal Attachment
Radius, Interosseous Membrane
Distal Attachment
Thumb (distal phalanx)

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10
Q

Compartment, Action, Innervation

Flexor Digitorum Profundus

A

Flexor Digitorum Profundus

Compartment
Anterior Deep Forearm

Action
Flexes wrist; 2nd-5th MP joints, PIP joints, and DIP joints

Innervation
Lateral ½ of muscle innervated by median nerve (C6–C8 nerve fibers), medial ½ of muscle innervated by ulnar nerve (C8 nerve fibers)

Proximal Attachment
Ulna, Interosseous Membrane
Distal Attachment
Fingers 2-5 (distal phalanges)

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11
Q

Compartment, Action, Innervation

Flexor Digitorum Superficialis

A

Flexor Digitorum Superficialis

Compartment
Anterior Intermediate Forearm

Action
Flexes wrist; 2nd-5th MP joints and PIP joints

**Innervation**
Median nerve (C6–C7 nerve fibers)

Proximal Attachment
Medial Epicondyle, Coronoid Process
Distal Attachment
Fingers 2-5 (mid. phalanges)

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12
Q

Compartment, Action, Innervation

Pronator Teres

A

Pronator Teres

Compartment
Anterior Superficial Forearm

Action
Pronates forearm

**Innervation**
Median nerve (C6–C7 nerve fibers)

Proximal Attachment
Medial Epicondyle, Coronoid Process
Distal Attachment
Radius (lateral surface)

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13
Q

Compartment, Action, Innervation

Flexor Carpi Radialis

A

Flexor Carpi Radialis

Compartment
Anterior Superficial Forearm

Action
Flexes wrist and abducts hand

**Innervation**
Median nerve (C6–C7 nerve fibers)

Proximal Attachment
Medial Epicondyle of humerus
Distal Attachment
Metacarpals II & III (base)

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14
Q

Compartment, Action, Innervation

Palmaris Longus

A

Palmaris Longus

Compartment
Anterior Superficial Forearm

Action
Weak wrist flexor

**Innervation**
Median nerve (C6–C7 nerve fibers)

Proximal Attachment
Medial Epicondyle of humerus
Distal Attachment
Flexor retinaculum, palmar aponeurosis

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15
Q

Compartment, Action, Innervation

Flexor Carpi Ulnaris

A

Flexor Carpi Ulnaris

Compartment
Anterior Superficial Forearm

Action
Flexes wrist and adducts hand

**Innervation**
Ulnar nerve (C8–T1)

Proximal Attachment
Medial Epicondyle of humerus, Olecranon, Ulna (posterior surface)
Distal Attachment
Pisiform, Hamate, Metacarpal V (base)

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16
Q

Compartment, Action, Innervation

Levator Scapulae

A

Levator Scapulae

Compartment
Posterior Axioappendicular

Action
Elevates scapula; inferiorly rotates scapula (pulls glenoid cavity inferiorly)

**Innervation**
Cervical nerves (C3–C4) and dorsal scapular nerve (C5)

Proximal Attachment
Cervical vertebrae
Distal Attachment
Scapula (medial border)

17
Q

Compartment, Action, Innervation

Rhomboid Major

A

Rhomboid Major

Compartment
Posterior Axioappendicular

Action
Elevates and retracts (adducts) scapula; inferiorly rotates scapula

Innervation
Dorsal scapular nerve (C5)

Proximal Attachment
Thoracic vertebrae
Distal Attachment
Scapula (medial border)

18
Q

Compartment, Action, Innervation

Rhomboid Minor

A

Rhomboid Minor

Compartment
Posterior Axioappendicular

Action
Elevates and retracts (adducts) scapula; inferiorly rotates scapula

Innervation
Dorsal scapular nerve (C5)

Proximal Attachment
Cervical vertebrae
Distal Attachment
Scapula (medial border)

19
Q

Compartment, Action, Innervation

Trapezius

A

Trapezius

Compartment
Posterior Axioappendicular

Action
Superior fibers: Elevate and superiorly rotate scapula Middle fibers: Retract scapula Inferior fibers: Depress scapula

**Innervation**
Accessory nerve (CN XI)

Proximal Attachment
Occipital bone, Ligamentum Nuchae, Cervical vertebrae
Distal Attachment
Clavicle, Acromial Process, Scapular Spine

20
Q

Compartment, Action, Innervation

Latissimus Dorsi

A

Latissimus Dorsi

Compartment
Posterior Axioappendicular

Action
Agonist of arm extension; also adducts and medially rotates arm (“swimmer’s muscle”)

**Innervation**
Thoracodorsal nerve (C6–C8)

Proximal Attachment
Thoracic vertebrae, Ribs, Ilium
Distal Attachment
Intertubercular Groove

21
Q

Compartment, Action, Innervation

Triceps Brachii - Long head

A

Triceps Brachii - Long head

Compartment
Posterior Brachial

Action
Primary extensor of forearm; Long head of triceps also extends and adducts arm

**Innervation**
Radial nerve (C5–C7 nerve fibers)

Proximal Attachment
Scapula (infraglenoid tubercle)
Distal Attachment
Olecranon

22
Q

Compartment, Action, Innervation

Triceps Brachii - Lateral head

A

Triceps Brachii - Lateral head

Compartment
Posterior Brachial

Action
Primary extensor of forearm

**Innervation**
Radial nerve (C5–C7 nerve fibers)

Proximal Attachment
Humerus (posterior, above radial groove)
Distal Attachment
Olecranon

23
Q

Compartment, Action, Innervation

Triceps Brachii - Medial head

A

Triceps Brachii - Medial head

Compartment
Posterior Brachial

Action
Primary extensor of forearm

**Innervation**
Radial nerve (C5–C7 nerve fibers)

Proximal Attachment
Humerus (posterior, below radial groove)
Distal Attachment
Olecranon

24
Q

Compartment, Action, Innervation

Abductor Pollicis Longus

A

Abductor Pollicis Longus

Compartment
Posterior Deep Forearm

Action
Abducts thumb; extends wrist (weakly)

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Radius & Ulna (proximal dorsal surface), interosseous membrane
Distal Attachment
Metacarpal I (lateral edge)

25
Q

Compartment, Action, Innervation

Extensor Pollicis Brevis

A

Extensor Pollicis Brevis

Compartment
Posterior Deep Forearm

Action
Extends MP joint of thumb; extends wrist (weakly)

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Radius, Interosseous Membrane
Distal Attachment
Thumb (proximal phalanx)

26
Q

Compartment, Action, Innervation

Extensor Pollicis Longus

A

Extensor Pollicis Longus

Compartment
Posterior Deep Forearm

Action
Extends MP and IP joints of thumb, extends wrist (weakly)

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Ulna, Interosseous Membrane
Distal Attachment
Thumb (distal phalanx)

27
Q

Compartment, Action, Innervation

Extensor Indicis

A

Extensor Indicis

Compartment
Posterior Deep Forearm

Action
Extends MP PIP and DIP joints of finger 2; extends wrist (weakly)

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Ulna, Interosseous Membrane
Distal Attachment
Tendon of extensor digitorum

28
Q

Compartment, Action, Innervation

Brachioradialis

A

Brachioradialis

Compartment
Posterior Superficial Forearm

Action
Flexes forearm

**Innervation**
Radial nerve (C6–C7 nerve fibers)

Proximal Attachment
Humerus (lateral supracondylar ridge)
Distal Attachment
Radius (Styloid Process)

29
Q

Compartment, Action, Innervation

Extensor Carpi Radialis Longus

A

Extensor Carpi Radialis Longus

Compartment
Posterior Superficial Forearm

Action
Extends wrist, abducts hand

**Innervation**
Radial nerve (C6–C7 nerve fibers)

Proximal Attachment
Humerus (lateral supracondylar ridge)
Distal Attachment
Metacarpal II (base)

30
Q

Compartment, Action, Innervation

Extensor Carpi Radialis Brevis

A

Extensor Carpi Radialis Brevis

Compartment
Posterior Superficial Forearm

Action
Extends wrist, abducts hand

**Innervation**
Radial nerve (C6–C7 nerve fibers)

Proximal Attachment
Lateral Epicondyle of humerus
Distal Attachment
Metacarpal III (base)

31
Q

Compartment, Action, Innervation

Extensor Digitorum

A

Extensor Digitorum

Compartment
Posterior Superficial Forearm

Action
Extends wrist; extends 2nd-5th MP joints, PIP joints and DIP joints

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Lateral Epicondyle of humerus
Distal Attachment
Fingers 2-5 (D & M phalanges)

32
Q

Compartment, Action, Innervation

Extensor Digiti Minimi

A

Extensor Digiti Minimi

Compartment
Posterior Superficial Forearm

Action
Extends MP and PIP joints of finger 5; extends wrist weakly

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Lateral Epicondyle of humerus
Distal Attachment
Finger 5 (proximal phalanx)

33
Q

Compartment, Action, Innervation

Extensor Carpi Ulnaris

A

Extensor Carpi Ulnaris

Compartment
Posterior Superficial Forearm

Action
Extends wrist, adducts hand

**Innervation**
Radial nerve (C6–C8 nerve fibers)

Proximal Attachment
Lateral Epicondyle of humerus, Ulna (posterior border)
Distal Attachment
Metacrapal V (base)

34
Q

Compartment, Action, Innervation

Deltoid

A

Deltoid

Compartment
Scapulohumeral

Action
Anterior fibers: Flex and medially rotate arm
Middle fibers: Prime mover of arm abduction
Posterior fibers: Extend and laterally rotate arm

**Innervation**
Axillary nerve (C5–C6)

Proximal Attachment
Clavicle (acromialial end), Scapula (acromial spine)
Distal Attachment
Deltoid Tuberosity

35
Q

Compartment, Action, Innervation

Teres Major

A

Teres Major

Compartment
Scapulohumeral

Action
Extends, adducts, and medially rotates arm

Innervation
Lower subscapular nerve (C5–C6)

Proximal Attachment
Scapula (inferior lateral border, inferior angle)
Distal Attachment
Lesser Tubercle, Intertubercular Groove

36
Q

Compartment, Action, Innervation

Subscapularis

A

Subscapularis

Compartment
Scapulohumeral

Action
Medially rotates arm

Innervation
Upper and lower subscapular nerves (C5–C6)

Proximal Attachment
Subscapular Fossa
Distal Attachment
Lesser Tubercle

37
Q

Compartment, Action, Innervation

Supraspinatus

A

Supraspinatus

Compartment
Scapulohumeral

Action
Abducts arm

**Innervation**
Suprascapular nerve (C5–C6)

Proximal Attachment
Supraspinous fossa
Distal Attachment
Greater Tubercle

38
Q

Compartment, Action, Innervation

Infraspinatus

A

Infraspinatus

Compartment
Scapulohumeral

Action
Adducts and laterally rotates arm

**Innervation**
Suprascapular nerve (C5–C6)

Proximal Attachment
Infraspinous fossa
Distal Attachment
Greater Tubercle

39
Q

Compartment, Action, Innervation

Teres Minor

A

Teres Minor

Compartment
Scapulohumeral

Action
Adducts and laterally rotates arm

**Innervation**
Axillary nerve (C5–C6)

Proximal Attachment
Scapula (upper dorsal lateral border)
Distal Attachment
Greater Tubercle

BIO2300 Unit 3 (10 decks)

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