Levator scapulae muscle

Levator scapulae muscle

The levator scapulae is a skeletal muscle arranged at the back and side of the neck. As the Latin name proposes, its principle work is to lift the scapula.

The levator scapulae begins from the back tubercle of the transverse procedure of cervical vertebrae one to four. The muscle is embedded into average fringe of the scapula reaching out from better edge than intersection of spine and average outskirt of scapula.

The levator scapulae may lie profound to the S at its cause, profound or adjoining the splenius capitis at its inception and mid-part, and profound to the trapezius in its lower parcel.

Relations 

One of the muscles inside the floor of the back triangle of the neck, the predominant piece of levator scapulae is secured by sternocleidomastoid and its second rate part by the trapezius. It is limited in front by the scalenus medius and behind by splenius cervicis. The spinal frill nerve crosses horizontally in the center piece of the muscle and the dorsal scapular nerve may lie profound to or go through it.

Variety 

The quantity of vertebral connections changes; a slip may reach out to the occipital or mastoid, to the trapezius, scalene or serratus front, or to the first or second rib. The muscle might be subdivided into a few particular parts from birthplace to inclusion. Levator claviculæ from the transverse procedures of a couple of upper cervical vertebræ to the external end of the clavicle relates to a muscle of lower creatures. Pretty much association with the serratus front muscle.

Nerve supply 

The levator scapulae is provided by a few parts of the fourth and fifth cervical nerves, and much of the time by a branch from the dorsal scapular nerve.

Blood supply 

The levator scapulae is provided by the dorsal scapular supply route. Ordinarily, this vein has a little branch which passes along the side to the supraspinatus fossa of the scapula, and in 33% of cases, this branch supplies the muscle. On the off chance that the dorsal scapular supply route falls off the transverse cervical conduit, the parent transverse cervical vein parts, the dorsal scapular corridor passes medially, while the transverse cervical course passes along the side.

Capacity 

At the point when the spine is fixed, levator scapulae hoists the scapula and pivots its mediocre edge medially. It regularly works in mix with different muscles like the rhomboids and pectoralis minor to pivot down.

Hoisting or pivoting one shoulder at any given moment would expect muscles to settle the cervical spine and keep it stable so it doesn't flex or turn. Hoisting both on the double with equivalent measures of draw on both side of cervical spinal sources would neutralize these powers. Descending revolution would be avoided by co-constriction of different muscles that lift the spine, the upper filaments of the trapezius, which is an upward rotator.

At the point when the shoulder is fixed, levator scapulae turns to a similar side and flexes the cervical spine along the side. At the point when the two shoulders are fixed, a concurrent co-compression of both levator scapulae muscles in equivalent sums would not create parallel flexion or revolution, and may deliver straight flexion or expansion of the cervical spine.