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QuestionAnswer
semispinalis thorisis OI O: TP T7-T12 I: SP T6-T4
Semispinalis Cervicis OI O:TP T1-T5 Articular process c4- C7 I: SP C2-C5
Semispinalis Capitis OI O: TP C7-T6, articular process C4-C6 I: Occipital bone between inferior and superior nuchal lines
Actions of semispinalis muscles? B/L extension of spine and head. U/L contralateral rotation, ipsilateral lateral flexion
Semispinalis innervation? dorsal rami of spinal nerves in area
Multifidus Lumborum OI O: Sacram, down to S4, illiac crest, psis, L1-L5 mamillary process I: SP of vertibrae 3-4 levels above
Multifidus thoricis OI O: TP T1-T12 I: SP of 3-4 vertibrae above
Multifidus cervicis OI O: Articular process C4-C7 I: SP C2
Innervation of multifidus muscles? dorsal rami of nerves in area
Action of multifidus? B/L spinal ext. and stabilization. U/L ipsilateral lateral flexion, contralateral rotation
Where are rotatores longus and brevis muscles usually seen? Thoracic spine, lots of rotation
Origin of Rotatores muscles? TP of all vertibrae
Insersion of rotatores? SP of 1-2 segments above for brevis and longus respectively
Action of Rotatores muscle? B/L spinal ext., U/L contralateral rotation
Levator costarum longus and brevis Origin? TP of thoracic spine
Insertion of levator costarum longus and brevis? Superior border of ribs 2 below or 1 below, respectively
Action of levator costarum muscles Elevate ribs
All of the muscles in this set, semispinalis, multifidus, rotatores, and levator costarum muscles are what layer and intrinsic or extrinsic? Layer 6, deep intrinsic
What muscles make up the transversospinalis group? Semispinalis, multifidus and rotatores muscles
What 4 muscles originate from the transverse processes? Semispinalis, multifidus, rotatores longus and brevis muscles
Created by: hopper