Term
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Definition
- Origin: Nuchal lig. and SP's of C7-T3 or T4
- Insertion: Tubercles of transverse vertebral proccesses of C1-C3 or C4
- Action: Lat. flexion of neck to side of active muscle; extension of head and nexk when working with splenius capitis
- Innervation: Dorsal rami of spinal nerves.
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Term
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Definition
- Origin: Nuchal ligt. and SP's of C7-T3 or T4
- Insertion: Mastoid proccess and lat. 1/3 of superior nuchal line
- Action: Rotation of head to side of active muscle; extension of head and neck when working with splenius cervicis
- Innervation: Dorsal rami of spinal nerves
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Term
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Definition
- Origin: Iliac crest, thoracolumbar fascia and SP's of T11-L5
- Insertion: Lumborum- angles of lower 6 ribs; thoracis upper 6 ribs; cervicis TVP of C4-6
- Action: Extension of the vertebral column
- Innervation: Dorsal primary rami
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Term
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Definition
- Origin: Iliac crest, thoracolumbar fascia and SP's of T11-L5
- Insertion: Thoracis- TVP's of thoracic vertibrae and ribs; Cervicis- TVP's of C2-6; Capitis- Mastoid process
- Action: Extension of the vertebral Column
- Innervation: Dorsal Primary rami
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Term
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Definition
- Origin: SP's
- Insertion: thoracis- SP's of T1-8; Cervicis- SP's of C2-4 (often absent); Capitis- fuses with semispinalis capitis to form biventoer capitis.
- Action: Extension of the vertebral Column
- Innervation: Dorsal primary rami
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Term
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Definition
- Origin: Thoracis- TVP's T6-T10; Cervicis- TVP's T1-T6; Capitis- TVP's C7-T6
- Insertion: Thoracis- SP's of C6-T4; Cervicis- SP's C2-C5; Capitis- occipital bone and articular process of C4-C6.
- Action: Thoracis- Bilateral extension of spine; unilateral rotation to opposite side; Cervicis- same as thoracis; will also unilaterallly lat. flex the spine; Capitis- extension and lat. flexion of head; rotation to opposite side
- Innervation: dorsal primary rami
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Term
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Definition
- Origin: sup. surfaces of SP's of cervical and lumbar vertebrae
- Insertion: Inferior surfaces of SP's of vertebrae sup. to origin
- Action: Extension and rotation of vertebral column
- Innervation: Dorsal Rami of spinal muscle.
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Term
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Definition
- Origin: TVP's of cervical and lumbar vertebrae
- Insertion: TVP's of adjacent vertebrae
- Action: lat. flexion of vertebral column; bilaterally, stabilize vertebral column
- Innervation: Dorsal and ventral rami of spinal nerve.
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Term
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Definition
- Origin: Longus - TVP's of T7-T10; Brevis- TVP's of C7-T11.
- Insertion: Longus- Outer part of rib, 2 ribs below origin; Brevis- outer part of rib below origin.
- Action: Elevates ribs in inspiration, lat. flexion of vertebral column
- Innervation: Dorsal rami of C8-T11 nn.
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Term
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Definition
- Origin: Longus and Brevis- TVP's (best developed in thoracic region)
- Insertion: Longus- pass superomedially to junction of lamina and TVP or SP 2 segments above. Brevis- Pass superomedially to junction of lamina and TVP or SP immediately above .
- Action: Stabilize vertebrae and assist with extension and rotatory movements; proprioception.
- Innervation: Dorsal rami of spinal nerve.
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