Muscles Flashcards
Cleidobrachialis
Origin: clavicle
Insertion: cranial border of humerus
Inner action: accessory nerve
Action: advance limb, extend shoulder jt
Cleidocephalicus- pars cervicalis
Origin: clavicle
Insertion: cranial 1/2 mid dorsal raphe
Innervation: accessory
Action: advance limb, extend shoulder jt
Cleidocephalicus- pars mastoidea
origin: clavicle
Insertion Temporal bone mastoid process
Innervation: accessory
Action: advance limb, extend shoulder jt
Trapezius
(Cervical and thoracic)
Origin: Median raphe, supraspinus ligament
Insertion: Spine of scapula
Innervation: accessory
Action: elevate and abduct limb
Omotransversarius
Origin: transverse process of atlas
Insertion: Distal spine of scapula
Innervation: accessory
Action: advance limb, flex neck laterally
Superficial Pectoralis
Descending and transverse
Origin: sternum
Insertion: greater tubercle of humerus
Innervation: Spinal nerve C7 C8
Action: adduct limb NWB, keep limb from abduction with weight
Deep pectoralis
Origin: ventral sternum
Insertion: Lesser tubercle of humerus
Innervation: Caudal pect nerves C8, T1
Action: adduct limb, pull trunk cranially, extend shoulder with weight.
NWB- draw limb caudally and flex shoulder
Latissimus Dorsi
Origin: Spinous process fascia
Insertion: teres tuberosity on humerus
Innervation: Thoracodorsal nerve C7, C8, T1
Action: draw limb caudal, flex shoulder
Rhomboideous
3 Parts
Origin: Nuchal crest
Insertion: Dorsal scapula
Innervation: cervical and thoracic spinal nerves
Action: elevate limb, draw scapula against trunk
Serratus ventralis
Origin: Transverse process last 5 CV, first 7-8 ribs
Insertion: dorsomedial 1/3 scapula
Innervation: Cervical spinal nerves
Action: Support trunk, depress scap
Sternocephalicus
Origin: Manubrium
Insertion: Mastoid part of temporal, nuchal crest
Innervation: accessory and cervical spinal
Action: head and neck to the side
Sternothyroideus
Origin: First costal cartilage
Insertion: Caudolateral thyroid cartilage
Innervation: Cervical spinal
Action: draw larynx and tongue caudal
Sternohyoideus
Origin: manubrium and first costal cartilage
Insertion: basihyoid bone
Innervation: Cervical spinal
Action: pull tongue, hyoid, and larynx caudal
Supraspinatus
Origin: Supraspinous fossa
Insertion: Greater tubercle humerus
Innervation: Suprascapular
Action: extend and stabilize shoulder
Infraspinatus
Origin: infraspinatus fossa
Insertion: greater tubercle humerus
Innervation: Suprascapular
Action: abduct and flex shoulder
Subscapularis
Origin: subscapular fossa
Insertion: Lesser tubercle of humerus
Innervation: subscapular
Action: adduct, extend shoulder
Deltoideus
Origin: Spine and acromial process of scap
Insertion: Deltoid tuberosity
Innervation: Axillary
Action: flex shoulder
Teres Major
Origin: Caudal border of scap.
Insertion: Teres major tuberosity of humerus
Innervation: axillary
Action: Flex shoulder rotate medially
teres Minor
Origin: Infraglenoid tubercle and caudal scap
Insertion: Teres minor tuberosity of humerus
Innervation: axillary
Action: Flex shoulder, rotate laterally
Long head of tricep
Origin: caudal scap
Insertion: Olecranon
Innervation: radial
Action: extend elbow, flex shoulder
Lateral head of triceps
Origin: tricipital line of humerus
Insertion: olecranon
Innervation: radial
Action: extend elbow
Medial head of triceps
Origin: crest lesser tubercle on humerus
Insertion: olecranon
Innervation: radial nerve
Action: extend elbow