Investing layer of the cervical fascia.
Muscles forming floor of posterior triangle.
Scalenus posterior 5 m.
A significant muscle in the posterior triangle region is the omohyoid muscle.
Muscles forming floor of post cerv triangle cont d anterior scalene hidden behind scm o.
Interior belly ot the omohyoid muscle.
Suboccipital muscles and contents of the suboccipital triangle.
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.
The suboccipital triangle has three boundaries contained between a floor and roof.
Levator scapulae 4 m.
It is split into two bellies by a tendon.
This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas.
The prevertebral fascia forms the floor of the posterior triangle of the neck figure 26 1c and d.
The roof is formed by fascia and the floor is formed by the splenius capitus levator scapulae and scalene muscles.
Bounded by the scm trapezius and middle third of the clavicle.
Anterior tubercles of transverse proc.
Semispinalis capitis 2 m.
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.
Splenius capitis 3 m.
The inferior belly crosses the posterior triangle travelling in an supero medial direction and splitting the.
To better expose the floor of the triangle up of the posterior thoracic wall in the 6th and 7th intercostal space a patient is asked to fold their arms across their chest laterally rotating the scapulae while bending forward at the trunk somewhat resembling a fetal position.
The following structures are superficial to the prevertebral tascia.
Boundaries of posterior cervical triangle apex.
Typically the triangle of auscultation is covered by the scapula.
From superior to inferior 1 m.
A roof.
Scalene tubercle of inner border of 1st rib and near groove of subclavian a.
The next video is starting stop.
Scm and trapezius meet on the superior nuchal line of the occipital bone.
The posterior triangle of the neck contains many muscles which make up the borders and the floor of the area.
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.