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ANATOMY - Block 1 Muscles
block 1 muscles w/ innervations and actions
57
Anatomy
Graduate
09/10/2017

Additional Anatomy Flashcards

 


 

Cards

Term

Trapezius

 

Innervation:

accessory n. (CNXI)

 

Action:

upper - elevates and upwardly rotates scapula;

middle - retracts scapula;

lower - depresses and upwardly rotates scapula

Definition
[image]
Term

Semispinalis capitis

 

Innervation:

dorsal rami of cervical spinal nerves

 

Action:

extends neck, rotates head to opposite side

Definition
[image]
Term

Splenius capitis and cervicis

 

Innervation:

dorsal rami of spinal nerves

 

Action:

alone - laterally bend and rotate neck to side of active muscle;

together - extend head and neck

Definition
[image]
Term

Serratus posterior superior

 

Innervation:

2nd - 5th intercostal nerves

 

Action:

elevates ribs during inspiration

Definition
[image]
Term

Serratus posterior inferior

 

Innervation:

ventral primary rami of T9-T12 spinal nerves

 

Action:

pulls ribs down and out during inspiration

Definition
[image]
Term

Latissimus dorsi

 

Innervation:

thoracodorsal n. (C6-8)

 

Action:

extends, adducts, and medially rotates humerus

Definition
[image]
Term

Levator scapulae

 

Innervation:

dorsal scapular n. (C5)

 

Action:

elevates and downwardly rotates scapula

Definition
[image]
Term

Rhomboid major and minor

 

Innervation:

dorsal scapular n. (C5)

 

Action:

adducts, retracts, and downwardly rotates scapula

Definition
[image]
Term

Erector spinae (spinalis, longissimus, iliocostalis)

 

Innervation:

dorsal rami of respective spinal nerves in each region

 

Action:

together - extend vertebral column;

alone - lateral flexion to the same side

Definition
[image]
Term

Pectoralis major

 

Innervation:

medial (C8, T1) and lateral (C5-7) pectoral nn.

 

Action:

adducts and medially rotates humerus

Definition
[image]
Term

Pectoralis minor

 

Innervation:

medial pectoral n. (C8, T1)

 

Action:

protract and depress scapula

Definition
[image]
Term

Serratus anterior

 

Innervation:

long thoracic n. (C5-7)

 

Action:

protract and upwardly rotate scapula;

stabilize scapula on thoracic wall

Definition
[image]
Term

Subclavius

 

Innervation:

subclavian n. (C5, 6)

 

Action:
stabilizes and depresses scapula

Definition
[image]
Term

Biceps brachii

(long and short heads)

 

Innervation:

musculocutaneous n. (C5-7)

 

Action:

flexes forearm;

supinates forearm

Definition
[image]
Term

Triceps brachii

(long, lateral, and medial heads)

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends forearm

Definition
[image]
Term

Coracobrachialis

 

Innervation:

musculocutaneous n. (C5-7)

 

Action:

flexes and adducts arm

Definition
[image]
Term

Deltoid

 

Innervation:

axillary n. (C5,6)

 

Action:

anterior fibers - flex humerus;

middle fibers - abduct humerus;

posterior fibers - extend humerus

Definition
[image]
Term

Teres major

 

Innervation:

lower sub scapular n. (C5,6)

 

Action:

medially rotates and adducts humerus

Definition
[image]
Term

Teres minor

 

Innervation:

axillary n. (C5,6)

 

Action:

stabilizes shoulder joint (rotator cuff muscle);

laterally rotates humerus

Definition
[image]
Term

Infraspinatus

 

Innervation:

suprascapular n. (C5,6)

 

Action:

stabilizes shoulder joint (rotator cuff muscle);

laterally rotates humerus

Definition
[image]
Term

Supraspinatus

 

Innervation:

suprascapular n. (C5,6)

 

Action:

stabilizes shoulder joint (rotator cuff muscle);

abducts humerus

Definition
[image]
Term

Subscapularis

 

Innervation:

upper (C5,6) and lower (C5,6) subscapular nn.

 

Action:

stabilizes shoulder joint (rotator cuff muscle);

medially rotates humerus

Definition
[image]
Term

Subscapularis

 

Innervation:

upper (C5,6) and lower (C5,6) subscapular nn.

 

Action:

stabilizes shoulder joint (rotator cuff muscle);

medially rotates humerus

Definition
[image]
Term

Brachialis

 

Innervation:

musculocutaneous n. (C5-7)

 

Action:

flexes forearm

Definition
[image]
Term

Anconeous

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends forearm

Definition
[image]
Term

Brachioradialis

 

Innervation:

radial n. (C5-8, T1)

 

Action:

flexes forearm

Definition
[image]
Term

Supinator

 

Innervation:

radial n. (C5-8, T1)

 

Action:

supinates forearm

Definition
[image]
Term

Pronator teres

 

Innervation:

median n. (C6-8, T1)

 

Action:

pronates and flexes forearm

Definition
[image]
Term

Flexor carpi radialis

 

Innervation:

median n. (C6-8, T1)

 

Action:

flexes hand;

adducts wrist

Definition
[image]
Term

Palmaris longus

 

Innervation:

median n. (C6-8, T1)

 

Action:

flexes wrist;

tightens palmar aponeurosis

Definition
[image]
Term

Flexor digitorum superficialis

 

Innervation:

median n. (C6-8, T1)

 

Action:

flexes PIP;

assists in MCP flexion

Definition
[image]
Term

Flexor digitorum profundus

 

Innervation:

medial part - ulnar n. (C8, T1);

lateral part - median n. (C6-8, T1)

 

Action:

flexes DIP of digits

Definition
[image]
Term

Flexor pollicis longus

 

Innervation:

median n. (C6-8, T1)

 

Action:

flexes IP of thumb

Definition
[image]
Term

Pronator quadratus

 

Innervation:

median n. (C6-8, T1)

 

Action:

pronates forearm

Definition
[image]
Term

Flexor carpi ulnaris

 

Innervation:

ulnar n. (C8, T1)

 

Action:

flexes and adducts wrist

Definition
[image]
Term

Palmaris brevis

 

Innervation:

ulnar n. (C8, T1)

 

Action:

tightens and corrugates skin over palm to improve grip

Definition
[image]
Term

Abductor pollicis brevis

 

Innervation:

recurrent branch of median n.

 

Action:

abducts thumb at CMC;

assists in opposition

Definition
[image]
Term

Flexor pollicis brevis

 

Innervation:

recurrent branch of median n.

 

Action:

flexes thumb at IP joint

Definition
[image]
Term

Opponens pollicis

 

Innervation:

recurrent branch of median n.

 

Action:

opposes thumb;

rotates thumb medially

Definition
[image]
Term

Abductor digiti minimi

 

Innervation:

ulnar n. (C8, T1)

 

Action:

abducts 5th digit (little finger)

Definition
[image]
Term

Flexor digiti minimi brevis

 

Innervation:

ulnar n. (C8, T1)

 

Action:

flexes MCP of 5th digit (little finger)

Definition
[image]
Term

Extensor carpi ulnaris

 

Innervation:

radial n. (C5-8, T1)

 

Action:

flexes and adducts wrist

Definition
[image]
Term

Extensor digitorum

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends MCP joints of digits;

assists in extension of IP joints

Definition
[image]
Term

Extensor digiti minimi

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends MCP joint of 5th digit (little finger);

assists in extension of IP joints

Definition
[image]
Term

Extensor carpi radialis brevis

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends wrist

Definition
[image]
Term

Extensor carpi radialis longus

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends and abducts (radially deviates) hand at wrist

Definition
[image]
Term

Abductor pollicis longus

 

Innervation:

radial n. (C5-8, T1)

 

Action:

abducts thumb at CMC joint

Definition
[image]
Term

Extensor pollicis longus

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends IP joint of thumb

Definition
[image]
Term

Extensor indicis

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends 2nd digit (index finger) at MCP

Definition
[image]
Term

Extensor pollicis brevis

 

Innervation:

radial n. (C5-8, T1)

 

Action:

extends MCP and CMC joints of thumb

Definition
[image]
Term

Adductor pollicis

 

Innervation:

ulnar n. (C8, T1)

 

Action:

adducts thumb towards middle digit at CMC joint

Definition
[image]
Term

Dorsal interossei

1-4

 

Innervation:

ulnar n. (C8, T1)

 

Action:

abduct digits from axial line;

assists in flexing MCP and extending IP joints of digits

Definition
[image]
Term
Omohyoid
Definition
[image]
Term

Opponens digiti minimi

 

Innervation:

ulnar n. (C8, T1)

 

Action:

opposes 5th digit (little finger) to thumb

Definition
[image]
Term

Palmar interossei:

1-3

 

Innervation:

ulnar n. (C8, T1)

 

Action:

adducts digits towards axial line;

assists in flexing MCP joints and extending IP joints

Definition
[image]
Term

Lumbricals 1 & 2

 

Innervation:

median n. (C6-8, T1)

 

Action:

flexes MCP joints;

extends IP joints

 

 

Definition
[image]
Term

Lumbricals 3 & 4

 

Innervation:

ulnar n. (C8, T1)

 

Action:

flexes MCP joints;

extends IP joints

Definition
[image]
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