It is split into two bellies by a tendon.
Muscles forming floor of posterior triangle.
Muscles covered by the prevertebral layer of the cervical fascia.
A roof.
Suboccipital muscles and contents of the suboccipital triangle.
Scalenus posterior 5 m.
Semispinalis capitis 2 m.
The inferior belly crosses the posterior triangle travelling in an supero medial direction and splitting the.
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.
Splenius capitis 3 m.
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.
From superior to inferior 1 m.
Floor posterior arch of atlas and posterior atlantooccipital membrane ligament.
Courses from the hyoid bone en route to the scapula within the pretracheal fascia.
Scm and trapezius meet on the superior nuchal line of the occipital bone.
Typically the triangle of auscultation is covered by the scapula.
Boundaries of posterior cervical triangle apex.
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.
Anterior tubercles of transverse proc.
Interior belly ot the omohyoid muscle.
The suboccipital triangle has three boundaries contained between a floor and roof.
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.
Muscles forming floor of post cerv triangle cont d anterior scalene hidden behind scm o.
The next video is starting stop.
Levator scapulae 4 m.
This ligament is broad and extends from the posterior margin of the foramen magnum to the posterior arch of atlas.
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.
Investing layer of the cervical fascia.
The following structures are superficial to the prevertebral tascia.
The prevertebral fascia forms the floor of the posterior triangle of the neck figure 26 1c and d.