Semispinalis capitis 2 m.
Muscles forming floor of posterior triangle.
A roof.
Typically the triangle of auscultation is covered by the scapula.
Muscles forming floor of post cerv triangle cont d anterior scalene hidden behind scm o.
The posterior triangle of the neck contains many muscles which make up the borders and the floor of the area.
This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas.
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A significant muscle in the posterior triangle region is the omohyoid muscle.
Splenius capitis 3 m.
The prevertebral fascia forms the floor of the posterior triangle of the neck figure 26 1c and d.
The inferior belly crosses the posterior triangle travelling in an supero medial direction and splitting the.
Scm and trapezius meet on the superior nuchal line of the occipital bone.
Courses from the hyoid bone en route to the scapula within the pretracheal fascia.
Bounded by the scm trapezius and middle third of the clavicle.
From superior to inferior 1 m.
Investing layer of the cervical fascia.
Muscles covered by the prevertebral layer of the cervical fascia.
Scalenus posterior 5 m.
The following structures are superficial to the prevertebral tascia.
The posterior triangle is crossed about 2 5 cm above the clavicle by the inferior belly of the omohyoid muscle which divides the space into two triangles.
The borders of the posterior triangle of the neck are formed by the trapezius muscle posteriorly the sternocleidomastoid muscle anteriorly and the omohyoid muscle inferiorly.
The roof is formed by fascia and the floor is formed by the splenius capitus levator scapulae and scalene muscles.
Interior belly ot the omohyoid muscle.
Anterior tubercles of transverse proc.
The suboccipital triangle has three boundaries contained between a floor and roof.
Boundaries of posterior cervical triangle apex.
Levator scapulae 4 m.
The floor of the posterior triangle is formed by the splenius muscles the levator scapula the three scalene muscles and the inferior belly of the omohyoid n26.
It is split into two bellies by a tendon.
Scalene tubercle of inner border of 1st rib and near groove of subclavian a.