Muscles forming floor of post cerv triangle cont d anterior scalene hidden behind scm o.
Muscles forming floor of posterior triangle.
Typically the triangle of auscultation is covered by the scapula.
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.
Scalene tubercle of inner border of 1st rib and near groove of subclavian a.
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The inferior belly crosses the posterior triangle travelling in an supero medial direction and splitting the.
Bounded by the scm trapezius and middle third of the clavicle.
Scalenus posterior 5 m.
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.
Boundaries of posterior cervical triangle apex.
The prevertebral fascia forms the floor of the posterior triangle of the neck figure 26 1c and d.
Suboccipital muscles and contents of the suboccipital triangle.
Muscles covered by the prevertebral layer of the cervical fascia.
Investing layer of the cervical fascia.
The following structures are superficial to the prevertebral tascia.
It is split into two bellies by a tendon.
Interior belly ot the omohyoid muscle.
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.
Floor posterior arch of atlas and posterior atlantooccipital membrane ligament.
A significant muscle in the posterior triangle region is the omohyoid muscle.
Scm and trapezius meet on the superior nuchal line of the occipital bone.
Semispinalis capitis 2 m.
Splenius capitis 3 m.
Levator scapulae 4 m.
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.
A roof.
Courses from the hyoid bone en route to the scapula within the pretracheal fascia.
From superior to inferior 1 m.