MUSCLES

Trapezius muscle

Origin	external occipital protuberance,nuchal ligament, medial superior nuchal line, spinous processes ofvertebrae C7-T12
Insertion	posterior border of the lateral third of the clavicle, acromion process, andspine of scapula
Artery	Variation 1- superficial branch of transverse cervical artery or Variation 2 - superficial cervical artery [1]
Nerve	accessory nerve (motor) cervical spinal nerves C3 and C4 (motor and sensation)
Actions	rotation, retraction, elevation, and depression of scapula
Antagonist	serratus anterior muscle, Latissimus dorsi

 

External occipital protuberance 

 

 

 

Nuchal ligament

 

The paxwax or nuchal ligament (ligamentum nuchae in Latin) is a fibrous membrane, which, in the neck, represents the supraspinal ligaments of the upper verte

bræ.  

Accessory nerve

In anatomy, the accessory nerve is anerve that controls specific muscles of the shoulder and neck.

Latissimus dorsi muscle

 

Origin	spinous processes of thoracic T7-L5,thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs, inferior angle of scapula
Insertion	floor of intertubercular groove of thehumerus
Artery	thoracodorsal branch of the subscapular artery
Nerve	Thoracodorsal nerve
Actions	adducts, extends and internally rotates the arm
Antagonist	deltoid, trapezius

  

Iliac crest

The crest of the ilium (or iliac crest) is the superior border of the wing of ilium and the superolateral margin of the greater pelvis

Thoracolumbar fascia 

Thoracodorsal nerve

The thoracodorsal nerve is a nerve present in humans and other animals. It is also known as the middle subscapular nerve or the long subscapular nerve. It supplies the latissimus dorsi muscle.

It arises from the brachial plexus. It derives its fibers from the sixth, seventh, and eighth cervical nerves

Levator scapulae muscle

Origin	Posterior tubercles of transverse processes of C1 - C4 vertebrae
Insertion	Superior part of medial border of scapula
Artery	dorsal scapular artery
Nerve	cervical nerve (C3, C4) and dorsal scapular nerve (C5)
Actions	Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula

 

Posterior tubercle of cervical vertebra

The posterior arch of a cervical vertebra forms about two-fifths of the circumference of the ring: it ends behind in the posterior tubercle, which is the rudiment of a spinous process and gives origin to the Recti capitis posteriores minores.

The diminutive size of this process prevents any interference with the movements between the atlas and the skull.

Dorsal scapular nerve

The dorsal scapular nerve arises from the brachial plexus, usually from the plexus root (anterior/ventral ramus) of C5.

Rhomboid minor muscle

Origin	nuchal ligaments and spinous processes of C7–T1
Insertion	medial border of scapula
Artery	dorsal scapular artery
Nerve	dorsal scapular nerve (C4–5)
Actions	Retracts and rotates scapula, fixes scapula to thoracic wall
Antagonist	serratus anterior