Bio 25 Lab - Cat Muscles

7/30/2019 Bio 25 Lab - Cat Muscles

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Muscles of the Abdominal Wall

• y. green – internal oblique

with transversus (under) – O: lumbodorsal fascia; border of

pelvic girdle

– I: linea alba

– A: compresses abdomen

• yellow – external oblique – O: lumbodorsal fascia; posterior ribs

– I: linea alba

– A: constricts abdomen



Muscles of the Abdominal Wall

• yellow – rectus abdominis – O: anterior end of pubic symphysis

– I: sternum and costal cartilages

– A: retracts rib and sternum;

compresses abdomen

• y. green – internal oblique



Muscles of the Chest

• orange – pectoantibrachialis – O: manubrium

– I: flat tendon on fascia of forearm

– A: draws arm towards chest

• blue – pectoralis major – O: sternum; median ventral raphe

– I: humerus


• yellow – pectoralis minor – O: sternum

– I: humerus


• y. green – xiphihumeralis – O: sternum

– I: humerus




Muscles of the Neck and Throat

• orange – sternomastoid – O: median raphe; manubrium

– I: superior nuchal line

– A: turn head; depress head on neck

• blue – sternohyoid – O: sternum

– I: basihyoid

– A: draws hyoid posteriorly

• yellow – sternothyroid – O: sternum

– I: thyroid cartilage

– A: pulls larynx posteriorly

• y. green –

thyrohyoid – O: thyroid cartilage

– I: posterior horn of hyoid

– A: raises the larynx




• yellow – clavobrachialis – O: clavicle; fibers of clavotrapezius

– I: ulna

– A: flexes forearm

•

green –

masseter – O: zygomatic arch

– I: mandible

– A: elevates lower jaw

• blue – digastric

– O: jugular and mastoid processes – I: mandible

– A: depresses lower jaw




• blue – mylohyoid – O: mandible

– I: median raphe

– A: raises floor of mouth; brings hyoid

forward

• y. green – geniohyoid – O: mandible near symphysis

– I: body of hyoid

– A: draws hyoid forward





Muscles of the Back and Shoulder

• green – rhomboideus capitis – O: superior nuchal line

– I: scapula

– A: draws scapula craniad, rotates scapula

• orange – splenius – O: middorsal line and fascia


– A: raises, turns head

• yellow – rhomboideus – O: neural spines of vertebrae

– I: vertebral border of scapula

– A: draws scapula dorsad

• y. green – supraspinatus – O: supraspinous fossa

– I: greater tuberosity of humerus

– A: extends humerus

• blue – infraspinatus – O: infraspinous fossa


– A: rotates humerus




• yellow – splenius

– O: middorsal line and fascia



• y. green – supraspinatus

– O: supraspinous fossa



• blue – infraspinatus

– O: infraspinous fossa






• orange –

splenius – O: middorsal line and fascia



• yellow – subscapularis – O: subscapular fossa

– I: lesser tuberosity of humerus

– A: pulls humerus medially

• y. green – supraspinatus – O: supraspinous fossa



• blue – infraspinatus – O: infraspinous fossa






• orange – clavodeltoid

– O: clavicle; fibers of clavotrapezius

– I: ulna

–

A: raises and rotates humerus• y. green – acromiodeltoid

– O: acromnion process

– I: surface of other deltoids

– A: raises and rotates humerus

• blue –

spinodeltoid – O: spine of scapula

– I: deltoid ridge




Muscles of the Back and Shoulder (Dorso-lateral View)

• y. green – serratus ventralis

– O: slips from first 9~10 ribs;

transverse process of last 5

cervical vertebrae

– I: scapula

– A: draws scapula craniad,

ventrad, against thoracic wall

• yellow – serratus dorsalis

– O: aponeurosis from medial line

–

I: last ribs – A: draws ribs forward



Muscles of the Back and Shoulder (Ventro-lateral View)

• orange –

latissimus dorsi

– O: neural spines of last thoracic, mostlumbar vertebrae; lumbodorsal fascia

– I: tendon on medial surface of humerus

– A: pulls forelimb dorsad and caudad

•

y. green –

serratus ventralis – O: slips from first 9~10 ribs;

transverse process of last 5 cervicalvertebrae

– I: scapula

– A: draws scapula craniad, ventrad,against thoracic wall

•

yellow –

serratus dorsalis – O: aponeurosis from medial dorsal

line

– I: last ribs

– A: draws ribs forwards



Muscles of the Back and Shoulder (Ventro-lateral View)

• blue – scalenes

– O: ribs

– I: transverse process of cervical

vertebra

– A: draws ribs forward; bends neck

• green –

(external/internal)intercostals

– O: posterior/anterior margin of rib

– I: anterior/posterior margin of

posterior rib

– A: brings rib forward/back



Muscles of the Back and Shoulder (Dorsal View)

• green –

multifidus spinae – O: various parts of posterior vertebrae

– I: neural processes of anterior vertebrae

– A: flexes and extends vertebral column

• y. green – sacrospinalis – O: various parts of posterior vertebrae

–

I: neural processes of anterior vertebrae – A: extends and flexes vertebral column

• yellow – iliocostalis – O: various parts of posterior vertebrae

– I: neural processes of anterior vertebrae

– A: extends and flexes back



Muscles of the Upper Arm (Dorsal View)

• triceps brachii• green – lateral head

• y. green – medial head

• yellow – long head

– O: distal end of humerus

– I: lateral surface of ulna

–

A: rotates ulna• orange – clavobrachialis

– O: clavicle; fibers of clavotrapezius

– I: ulna


• blue – brachialis

– O: lateral surface of humerus – I: ulna

– A: flexes forearm



Muscles of the Forearm (Ventral View)

• orange –

brachoradialis

– O: middle of humerus

– I: lower end of radius

– A: rotates hand to supine

• green – extensor carpi radialis (brevis,longus) – O: humerus

– I: 2nd and 3rd metacarpals

– A: extends hand

• yellow – pronator teres

– O: medial epicondyle of humerus

– I: radius

– A: rotates hand to prone

• blue – palmaris longus

– O: medial epicondyle of humerus

–

I: tendons passing through wrist ligaments – A: flexes digits

• y. green – epithrochlearis (upper arm) – O: latissimus dorsi

– I: olecranon process

– A: rotates ulna



Muscles of the Forearm (Dorsal View)

• orange –

brachoradialis – O: middle of humerus

– I: lower end of radius

– A: rotates hand to supine

• green – extensor carpi radialis – O: humerus

– I: 2nd and 3rd metacarpals

– A: extends hand

• blue –

extensor digitorum communis – O: lateral surface of humerus

– I: tendons internal to wrist ligaments

– A: extends 3~4 digits

• y. green – extensor digitorum lateralis – O: lateral surface of humerus

– I: tendons internal to wrist ligaments

– A: extends 3~4 digits

• yellow –

extensor carpi ulnaris – O: lateral epicondyle of humerus; semilunar notch

of ulna

– I: proximal end of 5th metacarpal

– A: extends 5th digit and ulnar side of wrist



Muscles of the Thigh (Dorsal View)

• orange –

sartorius – O: crest and ventral border of ilium

– I: proximal end of tibia, patella

– A: adducts and rotates thigh; extendsshank

•

y. green –

gluteus medius – O: adjacent fascia; crest and lateral

surface of ilium, transverse process of last sacral and first caudal vertebrae

– I: greater trochanter of femur

– A: abducts thigh

• green – gluteus maximus – O: fascia and transverse process of

last sacral and first caudal vertebrae

– I: fascia

– A: abducts thigh



Muscles of the Thigh (Dorsal View)

• yellow – caudofemoralis

– O: transverse processes of 2nd and 3rd

caudal vertebrae

– I: patella

– A: abducts thigh; extends shank

• l. blue –

tensor fascia latae – O: ilium

– I: fascia lata

– A: tightens fascia lata

• blue – biceps femoris

– O: tuberosity of ischium – I: patella, tibia; fascia of shank

– A: abducts thigh; flexes shank



Muscles of the Thigh (Ventral View)

• orange –

sartorius – O: crest and ventral border of

ilium

– I: proximal end of tibia, patella

•

quadriceps femoris• green – vastus lateralis

– O: greater trochanter andsurface of femur

• y. green – rectus femoris

– O: ilium

• yellow – vastus medialis

– O: femur

– I: patella

– A: extends shank




• blue – gracilis

– O: ischial and pubic symphysis

– I: aponeurosis passing tibia

– A: adducts leg

• l. blue – adductor longus

– O: pubis

– I: femur

– A: adducts thigh

• orange – adductor femoris

– O: pubis

– I: femur

– A: adducts thigh




• yellow – semimembranosus

– O: ischium

– I: medial epicondyle of femur,

proximal end of tibia

– A: extends thigh

• y. green –

semitendinosus – O: ischial tuberosity

– I: tibia

– A: flexes shank



Muscles of the Shank (Dorsal View)

• green –

gastrocnemius – O: surface fascia, femur, fascia and tendon of

plantaris

– I: calcaneus

– A: extends foot

• y. green – soleus – O: fibula

– I: calcaneus

– A: extends foot• yellow – peroneus

– O: fibula

– I: metatarsals and digits

– A: extends and flexes foot

• orange – extensor digitorum longus – O: lateral epicondyle of femur

– I: tendon on each digit

–

A: extends digits• blue – tibialis anterior

– O: proximal parts of tibia and fibula

– I: 1st metatarsal

– A: flexes foot



Muscles of the Shank (Ventral View)

• blue – tibialis anterior

– O: proximal parts of tibia and

fibula

– I: 1st metatarsal

– A: flexes foot

• yellow – flexor digitorum longus

– O: tibia, fibula, fascia

– I: phalanges

– A: flexes digits

•

orange –

tibialis posterior – O: tibia, fibula, fascia

– I: scaphoid and medial cuneiform

of ankle

– A: extends foot



Muscles of the Shank (Ventral View)

• y. green – soleus

– O: fibula

– I: calcaneus

– A: extends foot

•

l. blue –

plantaris – O: patella and femur

– I: calcaneus

– A: flexes digits

• green – gastrocnemius

– O: surface fascia, femur, tendonand fascia of plantaris

– I: calcaneus

– A: extends foot

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Bio 25 Lab - Cat Muscles