Origin
- Thoracolumbala fascia
- Sacrum
- Crista iliac
- Processus spinosus
- Th6-L5
- Costae 9-12
Attachment
- Angulus inferior scapulae
- Crista tuberculi minoris humeri
Innervation
- C6-C8 N. Thoracodorsalis
Plexa
- Pl. Brachialis
Function
Bilateral function
- Increases lordosis in lumbar spine
- Extension of the torso
Unilateral function
- Extension art. humeri
- Adduction art. humeri
- Inward rotation art. humeri
- Depression of the shoulder
- Adduction of scapulae
- Lateral flexion of trunk
- Ipsilateral rotation of torso
Artery
Antagonist
Joints involved
- art. Humeri
- Intervertebral joints Th6-L5
- art. Thoracoscapularis
Descriptive text
Latissimus originates via the thoracolumbar fascia and then extends over the scapulae and then attaches to the inside of the humerus. The muscle itself is wide, flat and a superficial muscle. It covers a large part of the lower and middle part of the back and mainly affects the torso movements when it is extended (when art. Humeri is flexed and abducted).
Exercise
Exercise suggestions
Therapist tips
- Trigger points in latissimus can cause pain in the arm and little finger side
Treatment recommendations
- Massage in various forms
- Acupressure
- Dry needling
- Joint manipulation
- Stretch (both at home and from a therapist)
- TENS
- NMES
- Cervical traction
- Heat