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CERVICAL MUSCLES - RHOMBOIDS
Cervical Spine Muscles Rhomboids Rhomboideus Major Minor medical legal movies

1. RHOMBOIDEUS MAJOR
DESCRIPTION
Rhomboideus major lies deep to trapezius.

ORIGIN
Rhomboideus major originates from the spines and supraspinous ligaments of the second to fifth thoracic vertebrae.

INSERTION
Rhomboideus major inserts into the medial scapulae border between the scapular spine and the inferior angle. medical legal movies.

VARIATIONS
Rhomboideus major insertion can extend to the costal and dorsal aspects of the scapulae.

INNERVATION
Rhomboideus major is innervated by the dorsal scapular nerve from C4 and C5 spinal nerves.

BLOOD SUPPLY
Rhomboideus major is supplied by the dorsal scapulae artery or deep branch of the transverse cervical artery, and dorsal perforating branches of the upper five or six posterior intercostal arteries. medical legal movies.

ACTION
Rhomboideus major adducts the scapula.
Rhomboideus major inwardly rotates and elevates the scapula.

FUNCTION
The rhomboids assist other scapular muscles to stabilise the scapula. Trapezius and rhomboids retract the scapula. Rhomboids, levator scapulae and pectoralis minor rotate the scapula downwards.
Cervical Spine Muscles Rhomboids Rhomboideus Major Minor chiropractor videos

2. RHOMBOIDEUS MINOR
DESCRIPTION
Rhomboideus minor lies deep to trapezius. medical legal movies.

ORIGIN
Rhomboideus minor originates from the lower ligamentum nuchae and the spines of the seventh cervical and first thoracic vertebrae.

INSERTION
Rhomboideus minor inserts into the medial end of the scapular spine. The dorsal and ventral layers enclose the inferior border of levator scapulae.

VARIATIONS
Rhomboideus minor is occasionally fused to rhomboideus major. The vertebral and scapular attachments can vary. Occasionally a muscle slip extends from the upper border of rhomboideus minor to the occipital bone (rhomboideus occipitalis).

INNERVATION
Rhomboideus minor is innervated by a branch of the dorsal scapular nerve from C4 and C5 spinal nerves. medical legal movies.

BLOOD SUPPLY
Rhomboideus minor is supplied by the dorsal scapulae artery or deep branch of the transverse cervical artery, and dorsal perforating branches of the upper five or six posterior intercostal arteries.

ACTION
Rhomboideus minor adducts the scapula.
Rhomboideus minor inwardly rotates and elevates the scapula.

FUNCTION
The rhomboids assist other scapular muscles to stabilise the scapula. Trapezius and rhomboids retract the scapula. Rhomboids, levator scapulae and pectoralis minor rotate the scapula downwards.
Cervical Spine Muscles Rhomboids Rhomboideus Major Minor medical legal movies

CERVICAL MUSCLES - MULTIFIDUS
Cervical Spine Muscles Multifidus medical forensic information

DESCRIPTION
Multifidus consists of many fleshy and tendinous fasiculi lying within the groove at the sides of the spine of the vertebrae from the sacrum to the axis. The latin word multus means many, findo means to cleave. medical forensic information.

ORIGIN
Multifidus originates on the posterior sacrum from the fourth sacral foramen, from the aponeurosis of erector spinae, the posterior superior iliac spine and dorsal sacro-iliac ligaments, from all lumbar mamillary processes, all thoracic transverse processes and the articular processes of the lower four vertebrae. medical forensic information.

INSERTION
Multifidus inserts into the length of the spine of the vertebrae above. The deepest fibres insert into the vertebrae directly above. The intermediate fibres insert into the second or third vertebrae above. The superficial fibres insert into the third or fourth vertebrae above.

INNERVATION
Multifidus is innervated by the dorsal rami of spinal nerves. medical forensic information.

BLOOD SUPPLY
Multifidus is supplied by muscular branches of the aorta.

ACTION
Multifidus stabilises adjoining vertebrae, and controls their movement during movement of the whole vertebral column. This allows more effective action of the long back muscles. In theory it can also extend, laterally flex and rotate the vertebral column.
Cervical Spine Muscles Multifidus medical forensic information

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