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3 Movements of the Trunk

3 Movements of the Trunk. Flexion Rotation Extension. TRUNK FLEXION. O: Crest of Pubis & ligaments covering front of symphysis pubis. I: By «3 portions into cartilages of 5th, 6th & 7th ribs. N: Lower intercostal nerves. Accessory Ms.:

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3 Movements of the Trunk

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  1. 3 Movements of the Trunk Flexion Rotation Extension

  2. TRUNK FLEXION

  3. O: Crest of Pubis & ligaments covering front of symphysis pubis.I: By «3 portions into cartilages of 5th, 6th & 7th ribs. N: Lower intercostal nerves. Accessory Ms.: Internal Obliques & external obliques (reverse action). TRUNK FLEXION: Rectus Abdominalis

  4. In backlying: flex. of thorax on pelvis is possible until scapulae are raised from the table. Motion is mainly at the thoracic spine. Fixation: Reverse action of hip flexor muscles. Weight of legs and pelvis. TRUNK FLEXION: ROM

  5. Limited ROM if: Tension of the posterior longitudinal ligament, ligamenta flava & interspinal & infraspinal ligaments. Tension of the spinal extensor muscles. Apposition of lower lips of vertebral bodies anteriorly with surfaces of subjacent vertebrae. Compression of intervertebral fibocartilages in front. Contact of lower ribs with abdomen. TRUNK FLEXION: Rectus Abdominalis

  6. Each vertebra is made up of

  7. Note: observe deviation of umbilicus. Upwardmovementindicatesstronger contraction of upper section muscle, & downwardmovement, stronger contraction of lowersection. TRUNK FLEXION: Testing Grade 1-0

  8. NEW MOVEMENT

  9. External Oblique: O: 8 digitations from external surfaces & inf. borders of lower 8 ribs. I: Ant. ½ of iliac crest & aponeurosis to pubic tubercle. N: Lower intercostals. Trunk Rotation: Internal & External Oblique

  10. Internal Oblique O: lateral half of upper surface of inguinal ligament, anterior 2/3 of iliac crest. I: Crest of pubis, linea alba, inf. bordres of cartilages of 3 last ribs. N: Lower intercostals. Trunk Rotation: Internal & External Oblique

  11. ROM in backlying: until scapula on side of forward shoulder is raised from table. Limited by: Tension of annulus fibrosus between vertebrae. Tension of oblique abdominal muscles on side opposite to those being tested. In thoracic area, tension of the costovertebral ligaments.In Lumbar area, interlocking of articular facets. Fixation: Reverse action of hip flexors. Accessory muscles: Lattissimus Dorsi. Semispinalis. Multifidus. Rotatores Rectus abdominis (combined trunk rotation & flexion). Trunk Rotation: Int. & Ext. Oblique: ROM

  12. Facet joints:

  13. Inter-vertebral disc (IVD):

  14. Note: Observe deviation of umbilicus,whichwill move towards the strongest quadrant if thereis a difference in strength of opposing oblique muscles. Trunk Rotation: Int. & Ext. Oblique: Gr. 1 & 0

  15. New Movement

  16. 5 muscles: Iliocostalis Dorsalis Longissimus dorsi Spinalis dorsi Iliocostalis lumborum Quadratus lumborum Sacrospinalis Trunk Extension

  17. Accessory muscles: Semispinales Rotatores Multifidus. ROM: Thoracicspineextendsonly to approximately a straight line. Lumbarspineextendsfreely. Fixation: Contraction of gluteus max. & hamstring muscles. Weight of pelvis & legs. Limitation of ROM: Tension of anterior Longitudinal ligament of spine. Tension of ant. Abdominal Muscles Contact of spinous processes. Contact of inf. articular margins with laminae. Trunk Extension

  18. Thoracic Spine

  19. THANK YOU

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