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J&S

Skull, Facial, Vertebral (Origin, Insertion, Action)

MuscleOriginInsertionAction
Masseter Zygomatic arch & process Angle, ramus & coronoid process of mandible, Elevates mandible
Temporalis Temporal fossa Coronoid process & anterior border of ramus of mandible Elevates & retracts mandible
Medial Pterygoid Medial surface of lateral pterygoid plate, sphenoid, palatine, tuberosity of maxilla medial surface of ramus of mandible Bilaterally (elevates & protracts mandible) Unilaterally (laterally deviates mandible to opposite side)
Lateral Pterygoid Superior head (greater wing of sphenoid), Inferior head (lateral surface of lateral pterygoid plate) Condyle of mandible, TMJ Bilaterally (protracts mandible), Unilaterally (laterally deviates mandible to opposite side)
Sternocleidomastoid Sternal head (manubrium), Clavicular head (medial clavicle) Mastoid process, lateral superior nuchal line Bilaterally (flexes neck, elevates rib cage), Unilaterally (bends neck laterally, rotates head to opposite side)
Scalenes Anterior Transverse processes (C3-C6) First rib Unilaterally (laterally flexes & rotates neck), Bilaterally (flexes neck, raises first rib - inhalation)
Scalenes Medius Transverse processes (C2-C7) First rib Unilaterally (laterally flexes & rotates neck), Bilaterally (flexes neck, raises first rib - inhalation)
Scalenes Posterior Transverse processes (C5-C7) Second rib Unilaterally (laterally flexes & rotates neck), Bilaterally (flexes neck, raises first rib - inhalation)
Splenius Capitis Ligamentum nuchae, spinous processes (C7-T1-4) Mastoid process, lateral superior nuchal line Unilaterally (laterally flex & rotate head & neck) Bilaterally (extend, hyperextend head & neck)
Trapezius Superior nuchal line, external occipital protruberance, ligamentum nuchae, spinous processes supraspinous ligaments of C7-T12 Upper (lateral clavicle), Middle (acromion & spine of scapula), Lower (spine of scapula - tubercle) Upper: Unilaterally: rotates V.C. opposite side, laterally flex V.C. same side, upwardly rotates, elevates scapula; Bilaterally: extends h&n Middle: retracts, stabilizes scapula, Lower Depresses, upwardly rotates scapula, Upper & lower: rotate scapula
Levator Scapulae Transverse processes (C1-C4) Medial border of scapula Unilaterally:- Elevates scapula, Downwardly rotates scapula, Laterally flexes head & neck, Rotates head & neck to same side; Bilaterally Extends head & neck
Quadratus Lumborum Posterior iliac crest 12th rib, Transverse processes (L1-L4) laterally flexes vertebral column, fixes ribs for forced exhalation
Transverse Abdominis Lateral inguinal ligament, iliac crest, thoracolumbar fascia, lower 6 ribs abdominal aponeurosis to linea alba compresses abdominal contents
Internal Oblique Lateral inguinal ligament, iliac crest, thoracolumbar fascia Lower 3 ribs, abdominal aponeurosis to linea alba compresses abdominal contents, laterally flexes & rotates vertebral column
Rectus Abdominis pubic crest, pubic symphysis Cartilage of ribs 5-7, xiphoid process flexes vertebral column, compresses abdomen
External Oblique Lower 8 ribs anterior iliac crest, abdominal aponeurosis to linea alba compresses abdominal contents, laterally flexes & rotates vertebral column
Diaphragm Sternal part (xiphoid process), Costal part (inner surface of lower 6 ribs), Lumbar part (L2-3) central tendon Phrenic nerve Draws central tendon downward for inspiration
Internal intercostals Inferior border of rib above Superior border of rib below Ribs up, inhalation
External intercostals Inferior border of rib above Superior border of rib below Ribs down, exhalation
Created by: rock-steady
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