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Cat Muscles Origin Insertion Function


Table6.4 P .105
  
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external intercostal
 

o: Rib
i: rib
f: draws ribs craniad
external obliques
 

o: lumbodorsal fascia & ribs
i: aponeurois on the linea alba
f: compresses abdominal viscera
rectus abdominis
 

O: pubic symphysis
i: sternum & costal cartilage
f: flexes trunk & compresses abdominal viscera
clavobrachialis
 

o: clavicle
i: proximal end of ulna
f: draws humerus craniad
pectoantebrachialis
 

O: manubrium
i: fascia of forelimb near elbow
f: adducts & rotates the forelimb
pectoralis major
 

o: cranial sternebrae
i: proximal half of humerus
f: adducts & rotates the forelimb
pectoralis minor
 

o: caudal sternebrae
i: proximal half of humerus
f: adducts & rotates the forelimb
xiphihumeralis
 

o: xiphoid process
i: proximal end of humerus
f: adducts & rotates the forelimb
blank
 

omit
blank
 
blank
digastric
 

o: mastoid & juglar processes of occipital
i: mandible
f: depresses lower jaw
geniohyoid
 

O: mandible
i: hyoid
f: draws hyoid craniad
hyoglossus
 

O: hyoid
i: tongue
f: retracts tongue
mylohyoid
 

o: mandible
i: median raphe
f: elevates floor of mouth
sternohyoid
 

o: manubrium of sternum
i: hyoid
f: draws hyoid caudal
sternomastoid
 

o: manubrium of sternum
i: lambdoidal ridge & mastoid process
f: rotates head
sternothyroid
 

o: manubrium of sternum
i: thyroid cartilage
f: draws larynx caudal
thyrohoid
 

o: thyroid cartilage
i: hyoid
f: draws larynx craniad
masseter
 

O; zygomatic arch
i: mandible
f: elevates lower jaw
temporalis
 

o: lambdoidal crest & zygomatic process of frontal bone
i; coronoid process of mandible
f: elevates lower jaw
acromiodeltoid
 

o: acromion process of scapula
i: humerus
f: flexes and rotates humerus
acromiotrapezius
 

o: neural spines of cervical and 1st thoracic vertebrae
i: metacromion process and spine of scapula
f: draws scapula dorsally & medially
clavotrapezius
 

o: nuchal line of skull & dorsal midline of neck
i: clavicle
f: draws humerus craniad
infraspinatus
 

o: infraspinous fossa of scapula
i: greater tuberosity of humerus
f: rotates the humerus
latissimus dorsi
 

o: lumbodorsal fascia & neural spines of the last thoracic and lumbar vertebrae
i: medial surface of humerus
f: elevates the arm and draws it caudal
levator scapulae ventralis
 

O: occipital bone and transverse process of atlas
i: metacromion process
f: draws scapula craniad
rhoboideus
 

o: neural spines of thoracic vertebrae
i: ventral border of scapula
f: draws scapula dorsally
rhomboideus capitis
 

o: superior nuchal line
i: angle of scapula
f: draws scapula craniad
spinodeltoid
 

o: spine of scapula
i; deltoid ridge of humerus
f: elevates & rotates the humerus
spinotrapezius
 

o: neural spines of thoracic vertebrae
i: fascia around scapula
f: draws scapula dorsally and caudal
splenius
 

o: mid-dorsal fascia of neck
i: nuchal line
f: turns and elevates head
supraspinatus
 

o: supraspinous fossa
i: greater tuberosity of humerus
f: extends the humerus
coracobrachialis
 

o: coracoid process
i: proximal end of humerus
f: adducts humerus
scalenus
 

o: ribs
i: cervical vertebrae
f: flexes neck, draws ribs craniad
serratus ventralis
 

o: first 10 ribs
i: vertebral border of scapula
f: draws scapula ventrally & craniad
subscapularis
 

o: subscapular fossa
i: lesser tuberosity of humerus
f: draws humerus medially
teres major
 

o: axillary border of scapula
i: medial surface of humerus
f: draws humerus medially
transversus costarum
 

o: sternum
i: first rib
f: draws sternum craniad
biceps brachii
 

o: border of glenoid fossa
i: tuberosity of radius
f: flexes forearm
brachialis
 

o: lateral surface of humerus
i: below semilunar notch of ulna
f: flexes forearm
epitrochlearis
 

o: lateral surface of latissimus dorsi
i: below semilunar notch of unla
f: flexes forearm

triceps brachii
lateral head
 

O: shaft of humerus
i: olecranon process of ulna
f: extends forearm

triceps brachii
medial head
 

o: axillary border of scapula
i: olecranon process
f: extends the forearm

triceps brachii
long head
 

o: humerus
i: olecranon fossa
f: extends forearm
brachioradialis
 

o: middle of humerus
i: distal end of radius
f: supinator of manus

extensors
(forearm-antebrachium)
 

o: omit
i: omit
f: extend manus or digits

flexors
(forearm-antebrachium)
 

o: omit
i: omit
f: flexes manus

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