Exam 3: Trunk and Spine Flashcards
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
Internal Intercostals
Attached between each rib
Decrease cavity and aids in forced expiration
Levator Costarum
Action: Rib elevation
Region: Between ribs
Scalenus
Action: Rib 1 elevation, cervical flexion, lateral flexion
Region: Transverse processes to rib 1
Serratus Posterior (superior)
Action: Rib elevation
Region: Upper ribs
Transversus Thoracis
Action: Rib Depression
Region: Inner surface of costal cartilage
Serratus Posterior (Inferior)
Action: Rib Depression
Region: Lower ribs
Subcostales
Action: Rib Depression
Region: Inner surface of ribs
