Functional Anatomy

Iliocostalis Thoracis (Superficial Erector Spinae)

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Linder Test 2

Functional Anatomy

Testing Tape Specification KT Method Confirmation Testing

Origin

upper borders of the angles of the lower
ribs 7-12 (medial to insertion of the
iliocostalis lumborum muscle but lateral to
the longissimus thoracis)

Insertion

Transverse processes of C7 and to the
angles of the upper ribs 1-6

Actions

Bilaterally, superficial erector spinae
extend the spine; contract strongly when
coughing and straining; when bending
forward, eccentric action of the erector
spinae increases in proportion to the
flexion to decelerate and control
movement to approximately 45o--beyond
that angle, ligamentous tension increases
to unload the spine; as muscles of
respiration, activity at the end of inhalation
and also during exhalation (only at
maximum ventilation rate)
Unilaterally, iliocostalis and longissimus
laterally flex (sidebend) to the same side
and rotate to the opposite side

Nerve

Lateral branches of the dorsal primary
division of the spinal nerves

0106-TR-XX Iliocostalis Thoracis (Superficial Erector Spinae)

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Functional Anatomy

2007-12-21

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