Face
My origin is the subcutaneous tissues surrounding the mouth
Orbicularis Oris
I have a capitus, atlantis and cervicus origin
Longissimus
My origin is the supraspinous fossa, scapular spine and scapular cartilage
Supraspinatus
I originate on the caudal margins of ribs 1-17
External intercostals
My origins include:
rectus femoris
lateral vastus
medial vastus
middle (intermedius) vastus
Quadriceps femoris
I originate on the masseteric fascia ventral to the facial crest
zygomaticus
I originate on the manubrium and my action is to open the mouth, stabilize the lower jaw, flex head & neck
sternomandibularis/ sternocephalicus
I insert on the spine of scapula and have cervical and thoracic origin
Trapezius
I run parallel to longissimus and have a cervicus, thoracis and lumborum origin
Iliocostalis
I am a superficial muscle that flexes the hip, extends the stifle, protracts hind limb and tenses the fascia lata
tensor fasciae latae
my action is to depress the lower eyelid
Malaris (Depressor Palpebral Inferioris)
What is the action for Longus Capitis
bilateral- flex the head
unilateral- lateral flexion of head & neck
I have a humeral, radial and ulnar head and my action is to extend carpus, flex elbow and extend digits
Common Digital Extensor
I am a deep muscle that isn't palpable.
my fibers run dorsal to ventral in the hind 1/3rd of the abdomen
transversus abdominis
I flex the stifle, extend the hock and insert on the Calcanean tuber via CCT
Gastrocnemius
What is the O,I,A of buccinator
O: buccal- dorsal-interalveolar space and alveolar border of the maxilla ventral- interalveolar space and alveolar border of the mandible molar- coronoid process, molar alveolar border of the maxilla and mandible and interalveolar space of mandible
I: commissures of the mouth
A:compress/ flatten the cheeks when chewing and retract the commissures of the mouth
What is the O,I,A of longissimus capitus, atlantis and cervicus
O: capitus & atlantis - transverse process of thoracic vertebra 1-2, articular process of cervical vertebra 3-7
cervicus- transverse processes of thoracic vertebra 1-7, semispinalis capitis and longissimus thoracis
I: capitus - mastoid process of temporal bone
atlantis - wing of atlas
cervicus- transverse processes of cervical vertebra 4-7
A: bilateral- stabilization & extend the head and neck
unilateral- lateral flexion of the head and neck
What is the O,I,A for the pectorals (All)
O: ascending (deep) - abdominal tunic, xiphoid cartilage, sternum, costal cartilages 4-9
descending (cranial superficial)- lateral aspect of the manubrium
transverse (caudal superficial)- sternum, costal cartilages 1-6
I: ascending- major and minor tubercles of the humerus and antebrachial fascia descending and transverse- crest of the humerus and antebrachial fascia
A: ascending- adduction and retraction of the limb
descending- adduction and protraction of the limb
transverse- adduction of the limb
What is the O,I,A for Longissimus thoracis and lumborum
O: dorsal spinous processes of the sacral, lumbar and thoracic vertebrae, wing of ilium and the supraspinous ligament
I: transverse processes of all lumbar & thoracic vertebrae, cervical vertebra 4-7 and lateral surfaces of proximal ribs
A: stabilization & extension of the vertebral column, increase the weight bearing capacity of the vertebral column, lifts the cranial part of the body when hindquarters fixed & lifts the caudal part of the body when the forequarters fixed
unilaterally- laterally flex the back to that side
What is the O,I,A for Biceps Femoris
O: vertebral head – dorsal spinous & transverse processes of sacral vertebra 3-5, broad sacrotuberal ligament and caudal fascia. pelvic head - ischiatic tuberosity
I:cranial – distal lateral femur, patella, lateral & middle patellar ligaments
Middle - patella, lateral & middle patellar ligaments, cranial border of tibia and crural fascia
caudal – crural fascia and calcanean tuber via common calcanean tendon
A: Together - abduct and extend hind limb
cranial - extend hip and stifle
middle - extend hip & flex stifle
caudal – flex stifle & extend hock