Exam 3: Trunk and Spine Flashcards
(31 cards)
Erector Spinae Group
Spinalis Capitus
Spinalis Cervicis
Spinalis Thoracis
Longissimus Capitus
Longissimus Cervicis
Longissimus Thoracis
Iliocostalis Cervicis
Iliocostalis Thoracis
Iliocostalis Lumborum
Action: spine extension, lateral
flexion, rotation, anterior pelvic
rotation, lateral pelvic rotation
Quadratus Lumborum (posterior)
Origin: posterior part of iliac crest
Insertion: 12th rib, transverse processes of L1-L4
Action: lateral flexion to same side, extension, stabilizes pelvis & lumbar spine, anterior pelvic rotation, lateral pelvic rotation to opposite side
External Obliques
Origin: lower 8 ribs
Insertion: iliac crest, linea alba, inguinal ligament, pubic crest
Action: lateral flexion to same side, trunk flexion, rotation to opposite side, posterior & lateral pelvic rotation
Internal Obliques
Origin: iliac crest, inguinal ligament
Insertion: linea alba, 8-10th ribs
Action: lateral flexion to same side, trunk flexion, rotation to same side, posterior & lateral pelvic rotation
Rectus Abdominis
Origin: pubic crest
Insertion: ribs 5-7, xiphoid process
Action: flexion of the trunk, posterior pelvic rotation
Transversus Abdominis
Origin: inguinal ligament, iliac crest
Insertion: linea alba, pubic crest
Action: supports viscera, forced expiration by pulling abdominal wall inward
Longus Colli Group
Action: Cervical spine flexion
Region: Anterior cervical
Interspinalis
Action: Extension
Region: Spinous processes
Intertransversarii
Action: Lateral flexion
Region: Transverse processes
Multifidus spinae
Action: Extension, rotation to opposite side
Region: Transverse processes
Rotatores
Action: Extension rotation to opposite side
Region: Transverse to spinous processes
Semispinalis Capitis
Action: Extension rotation to opposite side
Region: Occipital
Semispinalis Cervicis
Action: Extension rotation to opposite side
Region: Cervical
Semispinalis thoracis
Action: Extension rotation to opposite side
Region: Thoracic
Sternocleidomastoid
Origin: manubrium of sternum and the superior anterior-
medial part of the clavicle
Insertion: mastoid process of temporal bone
Action: flexion of cervical spine, lateral flexion to same side, rotation to opposite side, extension at atlantooccipital joint
Scalenes Group
Action: Flexion, lateral flexion, elevates 1st rib
Region: 1st rib
Longus Capitits
Action: Head flexion
Region: Occipital
Rectus capitus anterior
Action: Head flexion
Region: Occipital
Rectus capitis posterior
Action: Head extension, rotation
Region: Occipital
Splenius Capitus
Action: Extension, lateral flexion, rotation
Region: Mastoid process
Splenius Cervicis
Action: Extension, lateral flexion, rotation
Region: Cervical
Muscles of Respirtation
Diaphragm
External Intercostals
Internal Intercostals
Diaphragm
Dome-shaped at the level of the xiphoid process and last 7 ribs
Contracts downward to enlarge thoracic cavity during inspiration
External Intercostals
Attached between each rib
Rib elevation to enlarge cavity during inspiration
