muscles of back proper
Definition: muscles of the back innervated by the dorsal primary rami of spinal nerves; includes erector spinae, transversospinalis, interspinales, and anterior and lateral intertransversii muscles; excludes the superficial back muscles, which are appendicular and are innervated by ventral rami, and the trapezius, innervated by the spinal accessory nerve.
Synonym(s): musculi dorsi propriiTA, deep muscles of back, true muscles of back
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