Thoracolumbar muscles
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The document describes several muscles of the back, neck, and hips. It details the origin, insertion, innervation, and functions of muscles like the trapezius, latissimus dorsi, rhomboid, splenius capitis, erector spinae, internal and external obliques, quadratus lumborum, and hip flexors like the psoas and iliacus. These muscles act to extend, flex, rotate, stabilize, and breathe through coordinated actions around the vertebral column, scapula, ribs, and pelvis.
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Thoracolumbar muscles
- 1. B Y H O S S E I N K H O R R A M I P h D D O M P THORACOLUMBAR MUSCLES khorrami4@yahoo.com http://www.scribd.com/khorrami4
- 2. Vertebral bones • Cervical, 7 • Thoracic, 12 • Lumbar, 5 • Sacral, 5 fused • Coccygeal, 4 fused
- 3. • Four facet joints on each vertebrae
- 4. TRAPEZIUS MUSCLE • Origin • Occipital bone • Spinous process of C7- T12 • Insertion • Lateral clavicle • Acromion • Spine of scapula • Innervation C3-C4 & XI( accessory nerve) https://www.youtube.com/watch?v=P5sOhwBZon8
- 5. Trapezius, functions • Elevation of scapula • Retraction(adduct) scapula • Upwardly rotate scapula • Depress scapula • Neck extension https://www.youtube.com/watch?v=P5sOhwBZon8
- 7. LATISSIMUS DORSI • Origin • T7-T12(T6-T12) • 9th -12th ribs • Thoracolumbar fascia • Iliac crest • Crest of sacrum • Insertion • Intertubecular sulcus of humerus • Function • Adduct • Arm extension • Internal rotation of arm at the shoulder
- 8. BICIPITAL GROOVE • Biceps brachii • Latissimus dorsi • Pectoralis major • Teres major
- 10. • Origin • Transverse process of C1-C4 • Insertion • Medial border of scapula • Innervation • C3-C4 • Function • Cervical Spine: Extension, lateral flexion and ipsilateral rotation • Scapula: Elevation and downward rotation Levator Scapulae
- 12. Rhomboid Muscle • Origin • Spinous process C7-T1(minor)& T2-T5(major) • Insertion • Medial border of scapula • Scapular retraction • Elevation
- 13. Splenius Capitis • Origin: • C3-T3 • Insertion: • Occipital bone • Mastoid process • Function • Head & neck extension • Lat flexion Same side head rotation https://www.youtube.com/watch?v=unDACOZpBpI
- 14. Splenius Cervicis • Origin: • Spinous process of T3-T6 • Insertion: • Transvers process of C1-C3 • Function • Head & neck extension & hyperextension • Lat flexion Same side head rotation
- 15. Semispinalis Capitis • Origin • Articular process of C4-C6 • Transverse process of C7-T6 • Insertion • Occepital bone • Function • Ext & hyperext of the head and neck • Head & neck rotation to the opposite side
- 17. Semispinalis Cervicis • Origin • Transverse process of T1-T6 • Insertion • Spinous process C2-C5 • Function • Ext of the head and neck • Head & neck rotation to the opposite side • Laterally flex neck
- 18. THORACIC INTERMEDIATE MUSCLES • Spinalis • Semispinalis • Longissimus • Iliocostalis
- 21. THORACOLUMBAR MUSCLES • Superficial • Latissimus dorsi • Serratus posterior • Internal oblique • External oblique • Quadratus lumbarum • Intermediate • Erector spinae • Iliocostalis • Longissimus • Spinalis • Deep • Rotators • Brevis • Short • Longus • Interspinales • Intertransvesarii • Multifidus
- 22. Semispinalis Thoracis • Origin • Transverse process of T6-T10/12 • Insertion • Spinous process C6-C7 & T1-T4 • Function • Ext of the neck thoracic vertebrae • Neck & thoracic rotation to the opposite side • Laterally flex neck & thoracic vertebrae
- 25. Semi
- 28. ILIOCOSTALIS
- 30. LONGISSIMUS
- 31. LONGISSIMUS
- 33. Spinal Extensors
- 34. MULTIFIDUS • Multifidus muscles are very short muscles running from TVP of one vertebra up to the spinous process of the next vertebra upwards • Their main function is back stability • They do not produce a large range of movement, but work to produce small, "fine-tuning" postural movements, all day long
- 35. MULTIFIDUS • Stabilizing • Lateral flexion • Contralateral rotation • Lumbar curve • Walking • Coughing-Sneezing
- 37. SERRATUS POSTERIOR • Origin: SP T11-L2 • Insertion: Ribs 9-12 • Functions: • Deep expiration • Rotation • Trunk extension
- 40. INTERNAL OBLIQUE
- 41. INTERNAL OBLIQUE, FUNCTION • Trunk flexion • Abdominal compression • Deep Exhale • Rotation, same side
- 42. EXTERNAL OBLIQUE
- 43. EXTERNAL OBLIQUE • One of the outermost abdominal muscles, extending from the lower half of the ribs around and down to the pelvis • The lowest part connects to the crest of the ilium, the pubis, and the linea alba • Function: • Trunk flexion • Abdominal compression • Deep Exhale • Rotation, opposite side
- 48. HIP FLEXOR, PSOAS MUSCLE
- 50. Functions: • Quadratus Lumborum fixes the 12th rib to stabilize diaphragm attachments during inspiration • Lateral flexes the vertebral column • Extends lumbar vertebrae • It forms with the contralateral TFL and G.Medius to maintain frontal plane stability of the pelvis
- 51. HIP FLEXOR, PSOAS MUSCLE • Origin: T12-L5 • Insertion: lesser trochanter of femur • Innervation: L1-L3
- 52. ILIACUS MUSCLE • Origin: iliac fossa • Insertion: base of lesser trochanter • Innervation: femoral nerve