Deep Back Muscles Flashcards
Name the 3 Errector Spinae muscles from lateral to medial
Iliocostalis
Longissimus
Spinalis
Splenius Capitis Origin
Lower 1/2 of ligamentum nuchae
Spinous Process C VII to T IV
Splenius Capitis Insertion
Mastoid process
Skull below lateral 1/3 superior nucchal line
Splenius Capitis Function
Together- draw head back, extend neck
Individually- Draw and rotate head to same side
Splenius cervicis origin
SP TII- TVI
Splenius cervices insertion
Transverse process C I- C III
Function of splenius cervices
Together- extend neck
Individually - Draw neck and rotate to one side
Name the three parts of the spinalis muscles
Capitis
Cervicis (Evolving out of us)
Thoracis **questions will be on this
All originate and insert on spinous processess
3 parts of transversospinalis
Semispinalis
Multifidus
Rotatores
3 parts of semispinalis
capitis
cervicis
thoracis
All originate on transverse process and insert at spinous process
Function of semispinalis muscles
Extension and opposite side rotation
Multifidus Function
Extension and lateral flexion
Multifidus Origin and insertion
Origin- Sacrum, posterior iliac spine, mammillary process of lumbar, transverse process thoracic, articular process cervical
Insertion- Base of spinous process of all vertebrae
3 divisions of rotators of the back , origins and insertions
Function
Cervices- O- articular process, I- SP
Thoracies O- TP I- SP
Lumorum O- mammillary process I- SP
Function- opposite side rotation
3 divisions of longissimus
capitis
cervicis
thoracis
3 divisions of iliocostalis
Cervicis
Thoracis
Lumborum
all originate on angles of ribs (except lumborum- sacum, iliac crest, SP on lumbar verts
All insert on angles of ribs (TP for cervical)
Atlanto-occipital joint
Diarthrodial, Condylar (Ellipsoid), 3 DF
Convex occipital condyles articulate on concave facets
Atlanto-axial joint
lateral- Plane 2 DF Diarthrodial
Medial- Pivot 1 DF Diarthrodial
Articulation between C1 and C2
Joints of vertebral bodies
Symphsis 3 DF
Articulation between nucleus and disc of adjacent vert
minimal movement, constricted by fascia
Ligaments of joints of vertebral bodies
Anterior longitudinal ligament Posterior longitudinal ligament Intervertebral disks (annulus fibrosis, nucleus pulposus)
Movements of joints of vertebral bodies
Flexion Extension Hyperextension Rotation Lateral flexion
Joints of vertebral arches “facet joints”
Diarthrodial, Plane 3 DF
Articulation b/w superior articular facet of one vertebrae and inferior articular facet of another
Ligaments of facet joints
Articular capsule (fibrous layer, synovial membrane) Ligamentum flava Supraspinous LIgamentum nuchae Interspinous Intertransverse
Movements of vertebral aches “facet joint”
Flexion (most in cervical)
Extension (restricted in thoracic region)
Hyperextension
Lateral flexion (most free in cervical, lumbar)
Rotation (most in thoracic, least in lumbar)
Costotransverse Joint
Rib to Vertebral column
Distal end of rib articulate with body of vert
Tubercule of rib articular with transverse process
Action of errector spinae muscles
Extend intervertebral joints
Lateral flexion
no rotation since there is no angle!
