OT 503 - Unit 1 muscle attachments

Anterior, posterior extrinsic, posterior intrinsic trunk muscles

Sternocleidomastoid

at the manubrium/at the medial clavicle AND mastoid process

Scalene

cervical transverse processes AND anterior side at first rib/posterior side second rib

External oblique

lower ribs 5-12 AND iliac crest/linea alba/pubic tubercle

Internal oblique

thoracolumbar fascia/iliac crest/inguinal ligament AND lower ribs (9 or 10-12)/linea alba/pubic crest

Transversus abdominus

thoracolumbar fascia/iliac crest/inguinal ligament/lower ribs 7-12 AND linea alba/pubic crest

Rectus abdominus

pubic crest/tubercle/symphysis AND lower ribs 5-7/xiphoid process

Diaphragm

lower ribs/upper lumbar vertebrae/xiphoid process AND central tendon

Intercostals

rib (all) AND rib (all)

Splenius capitis & cervicis

nuchal ligament/spinous processes C7-T6 AND superior nuchal line/mastoid process/transverse processes C1-C3

Erector spinae group (ILS)

common tendon/iliac crest/spinous processes lumbar/lower thoracic vert. AND ribs/transverse processes

Semispinalis capitis

transverse processes in C/T regions AND b/t superior/inferior nuchal lines

Multifidus and rotatores

sacrum/PSIS/mammillary processes lumbar/transverse processes C/T vert. AND spinous processes

Interspinales

spinous process AND spinous process

Intertransversarii

transverse process AND transverse process

Suboccipital group

posterior tubercle C1/spinous process C2 AND inferior nuchal line/C1

Trapezius

superior nuchal line/ex occipital protuberance/nuchal ligament/spinous processes C7-T12 AND lateral clavicle/acromion/spine of scapula

Latissimus dorsi

spinous processes T7-L5/sacrum/iliac crest/lower ribs AND intertubercular sulcus of the humerus

Levator scapulae

transverse processes C1-C4 AND superior angle of scapula

Rhomboid major and minor

lower portion of nuchal ligament/spinous processes C7-T5 AND medial border of the scapula

Serratus posterior superior

nuchal ligament/spinous processes C7-T3 AND upper ribs 2-5

Serratus posterior inferior

spinous processes T11-L3 AND lower ribs 9-12