The interspinales are short

muscle fascicle A muscle fascicle is a bundle of skeletal muscle fibers surrounded by perimysium, a type of connective tissue. Structure Muscle cells are grouped into muscle fascicles by enveloping perimysium connective tissue. Fascicles are bundled togethe ...

s, found in pairs between the spinous processes of the contiguous

vertebra The spinal column, a defining synapomorphy shared by nearly all vertebrates, Hagfish are believed to have secondarily lost their spinal column is a moderately flexible series of vertebrae (singular vertebra), each constituting a characteristi ...

e, one on either side of the interspinal ligament. * In the cervical region the ''cervical interspinales'' are most distinct, and consist of six pairs, the first being situated between the

axis An axis (plural ''axes'') is an imaginary line around which an object rotates or is symmetrical. Axis may also refer to: Mathematics * Axis of rotation: see rotation around a fixed axis * Axis (mathematics), a designator for a Cartesian-coordinat ...

and third vertebra, and the last between the seventh cervical and the first thoracic. They are small narrow bundles, attached, above and below, to the apices of the spinous processes. * In the thoracic region the ''thoracic interspinales'' are found between the first and second vertebrae, and sometimes between the second and third, and between the eleventh and twelfth. * In the

lumbar region In tetrapod anatomy, lumbar is an adjective that means ''of or pertaining to the abdominal segment of the torso, between the diaphragm and the sacrum.'' The lumbar region is sometimes referred to as the lower spine, or as an area of the back ...

there are four pairs of ''lumbar interspinales'' in the intervals between the five lumbar vertebrae. There is also occasionally one between the last thoracic and first lumbar, and one between the fifth lumbar and the sacrum.

References

Back anatomy Muscles of the torso {{muscle-stub

See also

References