Actions_Neck and Suboccipital Flashcards
Rectus Capitis Posterior Major
capital extension, rotation of head to same side, lateral bending of head to same side
Rectus Capitis Posterior Minor
capital extension
Oblique Capitis Superior
capital extension, lateral bending of head to same side
Oblique Capitis Inferior
rotation of head to same side, lateral bending of head to same side
Longissimus Capitis
capital extension, lateral bending and rotation of head to same side
Splenius Capitis
capital extension, rotation of head to same side, and lateral bending of head to same side
Semispinalis Capitis
capital extension, rotation of head to OPPOSITE side, lateral bending of head to SAME side
Spinalis Capitis
capital extension
Longissimus Cervicis
cervical extension (bilateral) and lateral bending of C spine to SAME side (unilateral)
Semispinales Cervicis
cervical extension (bilateral), lateral bending of C spine to SAME side (unilateral), and rotation of C spine to opposite side (unilateral)
Iliocostalis Cervicis
cervical extension (bilateral), lateral bending of cervical spine to SAME side (unilateral)
assist depression of ribs
Splenius Cervicis
cervical extension (bilateral), lateral bending of C spine to SAME side (unilateral), rotation of C spine to same side (unilateral)
Spinalis Cervicis
extension of C spine
Interspinales Cervicis
extension of C spine
Intertransversii Cervicis
cervical extension (bilateral), lateral bending of C spine to SAME side (unilateral)
Rotatores Cervicis
rotation of C spine to opposite side
assist cervical extension
Rectus Capitis Anterior
capital flexion, stabilization of AO joint
Rectus Capitis Lateralis
lateral bending of head to same side, capital flexion, stabilization of AO joint
assist head rotation
Longus Capitis
capital flexion, rotation of head to SAME side
Mylohyoid
raises hyoid and tongue of swallowing, depresses mandible (with hyoid fixed)
assist capital flexion (weak)
Stylohyoid
pulls hyoid up and back (in swallowing), capital flexion (weak), participates in mastication and speech
assists depression of mandible
Geniohyoid
elevation and protraction of hyoid
assist capital flexion (weak) and mandible depression
Digastric
mandible depression, hyoid elevation, anterior belly draws hyoid forward, posterior belly draws hyoid backward
assist capital flexion (weak synergist)
Longus Colli
cervical flexion (weak), cervical rotation to OPPOSITE side, may laterally flex
Scalenus Anterior
cervical flexion, elevates 1st rib in inspiration, cervical rotation to OPPOSITE side, cervical lateral bending to SAME side
Scalenus Medius
cerivical flexion (weak), cervical lateral bending to SAME side, elevates 1st rib in inspiration, cervical rotation to OPPOSITE side
Scalenus Posterior
cervical lateral bending to SAME side, elevates 2nd rib in inspiration, cervical rotation to OPPOSITE side
Sternocleidomastoid
cervical flexion (bilateral), capital extension (bilateral), cervical lateral bending to SAME side (unilateral), rotation of head to OPPOSITE side (unilateral), raises sternum in forced inspiration
Sternothyroid
cervical flexion (weak), draws larynx down, depresses hyoid, mandible, and tongue after elevation
Thyrohyoid
cervical flexion, draws hyoid downward, elevates larynx and thyroid cartilage
Sternohyoid
cervical flexion (weak) and depression of hyoid
Omohyoid
depression of hyoid, cervical flexion
Platysma
cervical flexion (weak), draws lower lip downward and back
assists jaw opening and in forced inspiration