Muscle actions and attachments

What is the action of the brachiocephalicus muscle?

advance limb and extend shoulder or draw the neck and head laterally

What are the attachments of the brachiocephalicus muscle?

between the brachium and head

over shoulder and cervical intervertebral joints

What is the action of the cleidocephalicus muscle?

advance the limb and extend shoulder or draw the neck and head laterally

What are the attachments of the cleidocephalicus muscle?

Clavicular raphe to cervical, mastoid, occipital

What is the action of the cleidobrachialis muscle?

Advance limb and extend shoulder or draw the neck and head laterally

What are the attachments of the cleidobrachialis muscle?

Clavicular raphe to cranial border of humerus

What is the function of the omotransversarius muscle?

Advance limb or flex neck laterally

What are the attachments of the omotransversarius muscle?

Wing of atlas and distal scapular spine

What is the function of the trapezius muscle?

Elevate and abduct limb

What are the attachments of the trapezius muscle?

Dorsal midline raphe to spine of the scapula

What is the action of the rhomboideus muscle (capitis, cervicis, thoracis)?

Elevate scapula and adduct scapula against body

What are the attachments of the rhomboideus muscle?

Nuchal crest and dorsal midline of neck to dorsal border of scapula

what is the action of the latissimus dorsi muscle?

Draw limb caudally and flex shoulder or propel body forward

What are the attachments of the latissimus dorsi muscle?

Thoracolumbar fascia to teres major tuberosity

what is the function of the serratus ventralis muscle (cervicis and thoracic)?

supports weight of the trunk

what are the attachments of the serratus ventralis muscle?

Transverse process of cervical vertebrae and ribs to the serrated face of scapula

what is the function of the pectoral muscles?

adduction

What are the attachments of the pectoral muscles (superficial and deep)?

Sternum to humerus

What is the function of the subclavius muscle?

stabilization of the clavicle at the sternoclavicular joint during movements of the shoulder and arm

What are the attachments of the subclavius muscle?

Lateral cranial sternum to fascia of supraspinatus m

(absent in carnivores)

What is the function of the iliocostalis muscle?

Extensors of vertebral column

What are the attachments of the iliocostalis muscle?

Ilium to ribs

Lumborum - wing of ilium to last 4 ribs

Thoracis - T12 rib to C7

What is the function of the longissimus system muscle (thoracis, cervicis/capitis)?

Extensors of vertebral column

What are the attachments of the longissimus system muscles?

Ilium to wing of atlas

Thoracis et lumborum - crest of ilium to spines of lumbar vertebrae

Cervicis - thoracic vertebrae to last cervical vertebrae

What is the function of the transversospinalis system (spinalis, semispinalis, semispinalis capitis, multifidus, interspinales)

Extensors of vertebral column

What are the attachments of the transversospinalis system?

attached to bodies and DSPs of vertebrae

What is the action of the longus capitis muscle?

Flexors of the vertebral column

What are the attachments of the longus capitis muscle?

Cervical transverse processes to skull

What is the action of the longus colli m.

Flexors of the vertebral column

what are the attachments of the longus colli m.

Cervical and thoracic vertebrae (successive "Vs")

from T6 to C1

What is the action of the lumbar hypaxial mm.?

Flex hip and lumbar vertebral column

What are the attachments of the lumbar hypaxial mm.?

Thorcolumbar vertebrae to pelvis and femur

What is the action of the splenius muscle?

Extends and raises head and neck

Moves head and neck laterally

what are the attachments of the splenius muscle?

DSP of T1 to aponeurotic tendon

What is the action of the sternohyoideus muscle?

Pull tongue and larynx caudally

what are the attachments of the sternohyoideus muscle?

Manubrium to basihyoid bone

What is the action of the sternothyroid muslce?

Pull tongue and larynx caudally

what are the attachments of the sternothyroid muscle?

Manubrium to lateral surface of larynx

what is the action of the scalenus muscle?

inspiratory

What are the attachments of the scalenus muscle?

Muscle fiber direction- caudoventral

Insertion on ribs is caudoventral to origin

What is the action of the serratus dorsalis cranialis?

inspiratory

What are the attachments of the serratus dorsalis cranialis?

Muscle fiber direction- caudoventral

Neck and trunk to insertion on ribs is caudoventral to origin

What is the action of the diaphragm?

inspiratory

What are the attachments of the diaphragm?

Muscle fiber direction- caudoventral

Insertion on ribs is caudoventral to origin

What is the action of the rectus thoracis?

inspiratory

What are the attachments of the rectus thoracis?

Muscle fiber direction- caudoventral

Insertion on ribs is caudoventral to origin

What is the action of the external intercostals?

inspiratory

What are the attachments of the external intercostal muscles?

Muscle fiber direction- caudoventral

Insertion on ribs is caudoventral to origin

What is the function of the internal intercostals?

expiratory

What are the attachments of the internal intercostals?

fibers directed cranioventral from the cranial border of

ribs to insert on the caudal border of the preceding ribs. Cranial border to caudal

What is the action of the serratus dorsalis caudalis?

expiratory

What are the attachments of the serratus dorsalis caudalis?

fibers directed cranioventral

origin: thoracolumbar fascia

insertion: caudal border of ribs