Superficial muscles Flashcards
Masseter
O- Zygomatic arch
I- Masseteric fossa of the mandible
In- Masicatory n (br of mandibular n)
F- Raise the mandible
Trapezius
O- Dorsal median raphe of the neck C3 to the SP's of T1-9
I- Dorsal 2/3 scapular (CERVICAL)
Dorsal 1/3 scapular (THORACIC)
In- Dorsal br of the accessory n
F- Draws scapular dorsally (Together)
Craniodorsally (CERVICAL)
Caudodorsally (THORACIC)Sternocephalicus
O- 1st Sternebra/ Mandibrium
I- Mastoid part of the temporal bone & Nuchal crest of occipital bone
In- Accessory n
F- Draws the head ventrally & to one side
Protractor of FL
Brachiocephalicus
Cleidocephalicus & Ceidobrachialis
O- Distal 3rd cranial border of the Humerus
Crosses cranial lateral shoulder surface
Divides in two at the clavicular intersection
I- 2 parts:
Pars cervicalis- nuchal crest of the occipital bone
Pars Mastoidea- mastoid process
In- Accessory n
Ventral br. of cervical n
F- Advance FL
Extend shoulder
Draws head and neck to one side
Omotransversarius
O- Acromion of the scapular
I- Wing of Atlas
In- Ventral br of the 4th cervical n
F- Advances FL
Bends neck to one sideDeltoideus
O- Spine & Acromion of the Scapular
I- Deltoid tuberosity
In- Axillary n
F- Flexes shoulder
Brachialis
O- Lateral supracondylar crest
I- Disto-medial radius
In- Radial n
F- Flexes elbow
Ascending pectorals (Deep)
O- Body of the sternum
I- Greater and lesser tubercles of the humerus
Brachial fascia
In- Caudal pectoral n
F- Support trunk
Retract FL
Fixes shoulder jointSuperficial pectorals
Transverse & Descending
O- Mandibrium & Cranial part of sternum
I- Crest of Greater tubercle
In- Cranial pectoral n
F- Limb- trunk attachment
Adductor
Protractor
RetractorAnconeus
O- Olecranon fossa
I- Attaches with triceps tendon on the Olecranon
In- Radial n
F- Extends elbow
Rhomboideus
Capitis/ Cervicis/ Thoracis
O- Nuchal crest (Capitis)
Dorsal med. raphe of the neck C2-T1 (CERVICIS)
Cranial & thoracis spine (THORACIS)
I- Medial surface of scapular cartilage
In- Ventral br. of cervical n
F- Fix thoracic limb
Elevates and draws scapular forwardTeres Major
O- Caudal margin of the scapular
I- Teres major
In- Axillary n
F- Flexes shoulder
Teres Minor
O- Infraglenoid tubercle and distal infraspinous fossa
I- Teres minor tuberosity
In- Axillary n
F- Flexes shoulder
Supraspinatus
O- Supraspinatus fossa and scapular spine
I- Greater tubercle of the humerus
In- Suprascapular n
F- Extends & fixes shoulder
Infraspinatus
O- Infraspinatus fossa & scapular spine
I- Medial surface of the humerus
In- Suprascapular n
F- Flexes and abducts shoulder
Subscapularis
O- Subscapularis fossa
I- Lesser tubercle of humerus
In- Suprascapular n (main part)
Axillary n (Caudal part)
F- Adducts the shoulderSerratus Ventralis
Cervical & Thoracic
O- TP's C2-7 (CERVICAL_
Ribs 1-7 (THORACIC)
I- Facies serrata of the scapular
In- Ventral br. of cervical n (CERVICAL)
Long thoracic n (Thoracic)
F- Support trunk
Raises neckTensor Fascia Antibrachii
O- Caudal margin of scapular & Latissimus dorsi
I- Olecranon & Antebrachial fascia
In- Radial n
F- Extends elbow
Tenses forearm fasciaTriceps
Long/ Lateral/ Medial/ Accessory
O- Caudal margin of scapular (Long)
Proximal lateral humerus (Lateral)
Medial humerus (Medial)
Caudal neck of humerus (Accessory)
I- Olecranon
In- Radial n
F- Extend elbow
Flexes shoulderBiceps brachii
O- Supraglenoid tubercle of scapular
I- Radial tuberosity & proximedial ulna
In- Musculocutaneous n
F- Elbow flexor
Latissimus dorsi
O- Thoracolumbar fascia
I- Teres major tuberosity
In- Thoracodorsal n
F- Flex shoulder
Draws limb caudally
Draws trunk cranially (limb fixed)Sternohyoideus
O- Mandibrium
First costal cartilage
I- Basihyoideum
In- Ventral br of 1st cervical n
F- Draws hyoid and tongue caudallySternothydroideus
O- Mandibrium
First costal cartilages
I- Thydroid cartilage of larynx
In- Ventral br. of 1st Cervical n
F- Draws larynx caudally
