Muscles Forming Floor Of Posterior Triangle

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