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Back Layer 6
| Question | Answer |
|---|---|
| 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 |