Anterior Scalene
Origin- Transverse processes of 3rd through 6th cervical vertebrae
Insertion- first rib
Actions- Unilaterally: with the ribs fixed, laterally flex the head and neck to the same side, rotate head and neck to the opposite side
Bilaterally: Elevate the ribs during inhalation, flex the head and neck
Insertion- first rib
Actions- Unilaterally: with the ribs fixed, laterally flex the head and neck to the same side, rotate head and neck to the opposite side
Bilaterally: Elevate the ribs during inhalation, flex the head and neck
Middle Scalene
Origin- Transverse processes of 2nd through 7th cervical vertebrae
Insertion- First rib
Actions- Unilaterally: with ribs fixed, laterally flex the head and neck to the same side, rotate head and neck
to the opposite side
Bilaterally: Elevate the ribs during inhalation
Insertion- First rib
Actions- Unilaterally: with ribs fixed, laterally flex the head and neck to the same side, rotate head and neck
to the opposite side
Bilaterally: Elevate the ribs during inhalation
Posterior Scalene
Origin- Transverse processes of 6th and 7th cervical vertebrae
Insertion- Second rib
Actions- Unilaterally: with ribs fixed, laterally flex the head and neck to the same
side, rotate head and neck
to the opposite side
Bilaterally: Elevate the ribs during inhalation
Insertion- Second rib
Actions- Unilaterally: with ribs fixed, laterally flex the head and neck to the same
side, rotate head and neck
to the opposite side
Bilaterally: Elevate the ribs during inhalation