Muscles of the neck and vertebral column Head movements and trunk extensions

Muscles of the neck and vertebral column head

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Muscles of the neck and vertebral column: Head movements and trunk extensions Muscles of the neck and vertebral column: Head movements Platysma sits on the sternocleidomastoid. When contacted, will pull on the sternocleidomastoid. Scalene muscles are involved in inspiration. Splenius; -Head extension laterally and medially. Muscles of the neck and vertebral column: Intrinsic muscles of the back Iliocostalis, longissimus, spinalis: Sits laterally to the vertebral column. Erector spinae (all work together for back extension); 1.Start on the iliac spine 2.Longest one 3.Sits close to the spine Semispinalis; 53
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-Work with the erector spinae. -Involved in maintaining bpdy posture? Quadratus lumborum; -Works on the lower aspects of the vertebral column. -If one side is engaged, you will get flexion? Muscles of the thorax: Muscles of respiration E.I: Elevate rib cage I.I: Lower it. Muscles of the abdominal wall No bony protection, gets its protection from the 4 layers of muscles. Rectus abdominis: Most superficial one, runs straight. Linea alba: Muscles all meet in the middle causing the white line. Rectus abdominis: Originate on the pubic crest and pubic symphysis External oblique; Largest of the oblique muscles Transversus abdominis: The deep muscle Internal oblique: Muscles of the pelvic floor Levator ani: Lifts the anus, originates in the pubis area and insert on the coccyx. Coccygeus: Insert on the sacrum and the coccyx Superficial muscles of the thorax: Movement of the scapula Muscles of the anterior thorax Subclavius: originates on the first rib. Serratus anterior: Muscles of the posterior thorax Levator scapulae: adduct slightly to the midline. Muscles crossing the shoulder joint •Synergist: Helper, adds to the action of a prime mover, or stops a muscle from going too far. Muscles crossing the shoulder joint: latissimus dorsi Deltoid: When it contracts it will move the humerus away from the body. Pectoralis major: Pull the humerus toward the midline. Intertubercular sulcus: Groove of the humerus created by the tubercul, Muscles crossing the shoulder joint: Synergist muscles Muscles crossing the elbow joint: Anterior flexor muscles Muscles crossing the elbow joint: Posterior extensor muscles 54
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Triceps brachii; -Antagonist to the brachialis. Muscles of the forearm Main function is to control wrist movements. Anterior muscles: Elbow and wrist flexor. Muscles of the forearm: Anterior compartment Flexor digitorum superficialis; Superficial muscle that flexes the digits Carpal tunnel Tendons pass through the carpal tunnel. Muscles of the forearm: Posterior compartment Muscles of the lower limb Key joints: Hip and knee joint Anterior thigh muscles Iliopsoas contains 2 different muscles. Tibial tuberosity: Bump just under the knee that the doctor hits to test reflex. Medial muscles of the thigh Magnus: Big muscle, adductor of the magus does most of the work. All 4 starting on some aspects of the hip bone. Posterior thigh muscles Muscles of the leg: anterior compartment Tibialis anterior: Starts on the tibia, attaches on the metacarpals. Muscles of the leg: Lateral compartment 55
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Anatomy of the nervous system Slide 5 Integration: CNS.
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