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Back Layer 4, 5

Back layer 4, 5

Splenius capitis OIIA O: Ligamentum nuchae, SP C7-T3 I: Lteral 1/3 superior nuchal line and mastoid process I:dorsal rami C1-T1 A: B/L Head ext., U/L ipsilateral lateral flexion and rotation
Splenius cervisis OIIA O: SP T3-T6 I: TP C1-C3 I: dorsal rami lower C/S nerves A: B/L neck ext. U/L ipsilateral lateral flexion and rotation
Illiocostalis Lumborum OI O: Common tendon of erector spinae, illiac crest I: INferior borders ribs 6-12 at rib angles
Illiocostalis thoricis OI O: Superior borders of ribs 6-12 at angles I: ribs 1-6 at angles, TP C7
Illiocostalis Cervisis OI O: 3-6 ribs at angles I: Posterior tubricles of TP C4-C6
Illiocostalis actions are? B/L spinal ext, maintain post. U/L ipsilateral lateral flexion
Longissimus Thoracis OI O: Common tendon of erector spinae, TP L1-L5, accessory process L1-L5 I: TP T1-T12, 3-12 ribs medial cartilage
Longissimus Cervicis OI O: TP T1-T5 I: posterior tubricles TP C2-C6
Longissimus capitis OI O: TP T1-T5 I: Posterior margin mastoid process
Longissimus muscles action is? B/L spinal ext (cervicis & thoricis) U/L lateral flextion. Capitis B/L extends the head, U/L ipsilateral rotation
All of the erector spinae muscles are layer? Layer 5
All of the muscles in layers 4 and 5 are? Intrinsic muscles, move spine
Spinalis thoricis OI O: SP T11-L2 I: SP T1-T4
Spinais cervicis OI O: Ligamentum nuchae, SP C7-T2 I: SP C2-C4
Spinalis capitis OI O: SP lower C/S and upper T/S I: Between inferior and superior nuchal lines
Spinalis actions are? B/L spinal and head ext
Erector spinae muscles go in what order from lateral to medial? Illiocostalis, Longissimus, Spinalis
Erector spinae muscles are all innervated by? dorsal rami in area
Created by: hopper



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