Vertebral column extension & lateral flexion Spinalis m. - thoracic - cervicis Spines of vertebrae Spines of vertebrae above origin Spinal nn. Lateral flexion would not be possible if not for the action of many muscles of the trunk and neck. 5 and 6)Neck lateral flexion—the neck lateral flexion is shoulder through a sideways movement of the neck, directing the ear toward the shoulder tip on both sides. Plantar flexion involves a coordinated effort between several muscles in your ankle, foot, and leg. The pectoralis muscle is the main shoulder flexor and is important for muscle definition in the chest. Neck lateral flexion muscles-Anterior scalene, Middle scalene, Splenius cervicis, Splenius capitis, Rectus capitis lateralis, Longus colli, Intertransversarii. ... Lateral rotation is a rotating movement away from the midline. Muscles that perform flexion, extension, right lateral flexion, and/or left lateral flexion must have a vertical component to their fiber direction. Muscles that produce this motion tend to originate on the side of one vertebra or vertebrae and attach to the side of another vertebra or vertebrae elsewhere in the spine, so that by contracting these muscles shorten the spine along one side and pull the trunk laterally. ... Flexion and Extension. Rotation: Note: There is practically no rotation that occurs at the lumbar spine due to the design of the facet joints in the lumbar region, which only allow up to 2 degrees of rotation (this is a protective mechanism, as too much lumbar rotation would put the spinal cord at high risk of injury). (“Cervical spine rotation and lateral flexion combined motion in the examination of the thoracic outlet”). Muscles. Patient attempts to touch left ear to left shoulder and right ear to right shoulder. Anatomical terms of movement are used to describe the actions of muscles on the skeleton. This is in the opposite direction to the movements described above. This offers bilateral comparison cervical lateral flexion. Think about using rib mobilizations and stretching/using muscle energy techniques on the muscles that attach to the first rib. The muscle acts to pull the rib cage down (flexion of the vertebral column), either bilaterally (straight flexion) or unilaterally (flexion with rotation). It is innervated by both the lateral and medial pectoral nerves. These include: Gastrocnemius: This muscle makes up half of your calf muscle… trunk lateral flexion. Weakness/tightness in the Erector Spinae may result in overworking the QL muscles to pick up the slack, hence resulting in back pain. Note: tests should only be performed by a properly trained health care practitioner. Vertebral column extension & lateral flexion Longissimus m. - thoracis - cervicis - capitis Transverse processes of lumbar through cervical vertebrae Transverse processes above origin and ribs Spinal nn. The petoralis major is a large, strong muscle that produces shoulder flexion. The muscle gets its name from its fiber orientation, which is arranged obliquely (superior-to-inferior angle, lateral to medial). The movement is brought about by the action on one side of the body of the external and internal oblique muscles, and the quadratus lumborum. The vast majority of trunk/torso rotation occurs in the thoracic spine (see thoracic rotation). Muscles that perform right or left rotation must have a horizontal component to their fiber direction; in fact, it can be helpful to view them as partially “wrapping” horizontally around the trunk. Muscles contract to produce movement at joints - where two or more bones meet. Lateral flexion involves side bending away from the midline of the body, called abduction, and then straightening back to the center, called adduction. 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