Spry Juncture, LLC
How to Evolve Gracefully
Semispinalis
Region
Origin & Insertion
['Origin: Transverse processes of C4–T12', 'Insertion: Spinous processes 4–6 segments above origin']
Synergistic Muscles
['Multifidi', 'Rotatores']
Joints
['Spinal intervertebral joints']
Primary Actions
['Extension of head, cervical, and thoracic spine', 'Contralateral rotation']
Nerve & Spinal Segment
Dorsal rami of spinal nerves
Segmental cervical and thoracic nerves
Interesting
Part of transversospinalis group; stabilizes vertebrae. [Grant’s]
Reversal of Action
Thoracic lift from a fixed cervical base
Common Dysfunctions
Impaired trunk extension, reduced cervical control
How to Stretch
Neck flexion and rotation away.
Trigger Points
How to Strengthen
Head and trunk extension with rotation.
Concentric Action
Extend thoracic and cervical spine
Applications:
Targets upper thoracic endurance for posture and breathing
Eccentric Action
Control forward bending
Isotonic Action
Back extension against gravity
Related Conditions
['Tech neck', 'Postural syndrome']
Isometric Action
Hold upright posture seated or standing
Exercise Ideas
['Diagonal lifts', 'Cervical stabilization', 'Prone shoulder lifts']