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Interspinales thoracis
Other Terms:
Interspinales thoracis,
Interspinales thoracis set,
Set of interspinales thoracis muscles,
Musculi interspinales thoracis,
Muscle interépineux du thorax
Muscle parts
None
Latin name
Musculi interspinales thoracis
Latin muscle parts
None
Group
Epaxial muscle – Interspinales
Etymology
The English name for this muscle is the muscle between the thorns or spines. The word interspinales comes from the Latin words inter meaning “between” and spina meaning “thorn.” This term was applied to pointed projections and in the 14th century was applied to the vertebral column with all its palpable spinous processes that form the dorsal line of the backbone. The word thoracis comes from the Greek thorakos meaning “breast plate or chest.”
Origin
Side of the apex of the spinous process of twelfth, third, and second thoracic vertebrae
Insertion
Side of the apex of the spinous process of the eleventh, second, and first thoracic vertebrae
Action
Possibly weakly assist with extension of the thoracic vertebrae. They are most likely proprioceptive transducers that monitor the position and movements of the vertebral column and provide feedback that influences the activity of the larger multisegmental muscles of the vertebral column.
Nerve supply
Dorsal rami of thoracic spinal nerves (T1, T2, and T11)
Blood supply
Dorsal branches of the posterior intercostal arteries from the thoracic aorta.
Latin
Musculi interspinales thoracis
French
Muscle interépineux du thorax
