The rectus abdominis is you “six pack” muscle. It originates on the pubic bone and inserts on the costal cartilage of ribs 5-7, and the xiphoid process of the sternum. It’s main actions are to flex and rotate the spine, as well as increase the intra-abdominal pressure. Trigger points in this muscle refer pain into the mid and lower back. This muscle is tight in people who slouch and have a posteriorly rotated pelvis. An anteriorly rotated pelvis can be corrected by strengthening this muscle.
The Sternocleidomastoid muscle is a strap like muscle in your neck. It originates on the manubrium and medial clavicle. It inserts on the mastoid process of the temporal bone, and the superior nuchal line. This muscle acts alone to rotate the face to the opposite side and lift it two rod the ceiling. Together they flex the head and neck. Trigger points in sternal division of this muscle refer pain to the cheek and along the supraorbital ridge. The lowest points refer down to the sternum. The highest points refer to the occipital ridge and vertex of the head. Trigger points in the costal division refer to the into the forehead. The most superior trigger points refer into the ear, and can postural dizziness.
The trapezius muscle is a large diamond shaped muscle that travels from the neck to the mid back. It originates on the nuchal ligament, and the spinous processes of C6-T12. It has its insertion on the scapular spine, acromion process, and distal clavicle. The upper fibres of this muscle work to elevate the shoulder, and rotate the glenoid fossa upwards. The lower fibres assist this motion, and the middle fibres are strong adductors of the scapula. This is the number one muscle in the body tp get trigger points. Trigger points in the lateral upper edge refer pain in the lateral neck and temples, a common cause of headaches. Points in the middle and lower fibres refer pain into the posterior neck and shoulder.
The temporalis muscle is located at the temples of the skull. It originates on the temporal lines of the parietal bone of the skull. It inserts on the coronoid process of the mandible. It functions bilaterally to close the jaw, and unilaterally to deviate the mandible to the same side. When trigger points develop in this muscle they often cause headaches into and above the eye and temple as well as hypersensitivity of the teeth.
The vastus lateralis muscle is one of the quadriceps muscles of the thigh. It originates on the greater trochanter, intertrochanteric line, and linea aspera of the femur. It inserts on the Patella via the quadriceps tendon and tibial tuberosity via the patellar ligament. It’s main function is to extend the knee. Trigger points in this muscle refer pain all along the lateral thigh and into the lateral knee.
the rectus abdominis muscle is your “six pack” muscle. It originates on the pubic bone, and inserts on the costal cartilage of ribs 5-7, and the xiphoid process of the sternum.its main actions are to flex and rotate the spine, and to increase intra-abdominal pressure. This muscle is often tight in people who slouch, or have a posteriorly tilted pelvis. In people with an anteriorly rotated pelvis this muscle is often weak and needs to be strengthened. Trigger points in this muscle refer pain into the mid and lower back
The adductor pollicis muscle is a key mover of the thumb. This muscle has two heads. The transverse head originates on the third metacarpal. The oblique head originates on the base of the second and third metacarpals and the capitate and trapezoid bones. This muscle inserts on the base of the proximal phalanx and ulnar sesamoid. Adduction and flexion of the thumb are the main actions it produces. Trigger points cause an aching pain along the outside of the thumb and hand. Pain can also be felt in the thenar eminence in extreme cases.