Anatomy of the Shoulder Blades
READ: The Trapezius Pg 139-143, Rhomboids and Serratus Anterior 157-166
Bones
- Scapula: Shoulder blade
- Costals: Rib Cage
- Coricoid Process: boney landmark on the scapulas where pec minor attaches
- Humerus: Arm bone
- Clavical: Collar Bone
The Movements
- Elevation: lifting upward
- Depression: Downward
- Retraction: Inward
- Protraction: Outward and forward toward front of body
- Upward Rotation: Upward and bottom of shoulder blades protract
- Downward Rotation: Back to neutral
- Anterior Tilt (upward tilt): Shoulder Blade climbs over the rib cage
- Posterior Tilt: Shoulder Blade moves down, and bottom wingtips press lower ribs forward
The Muscles
Errector Spinae
- Trapezius: Large trapezoid shaped muscle that has 3 sections to it creating 3 different primary joint actions: Elevation, Depression, Retration.
- Serratus Anterior: large muscle that attaches to the medial boarder of the scapula from underneath the scapula. It pulls the muscles toward its other attachment points – the costars. primarily creates protration.
- Rhomboids: The Rhomboid major and minor retract the scapula
- Pectoralis Minor: Creates anterior tilt of scapula
- Levator Scapulae: Elevates the scapula toward head
Exercises for Strength and Awareness
Plank Pose: With shoulder blades protracted will strengthen the serratus anterior.
Seated Rows: Its hard to target the rhomboids in yoga against body weight or resistance – this is because they are pulling muscles. While there are many ways to get creative, the most effective way to strengthen the rhomboids is to do some sort of pulling exercise – seated rows at the gym, or actually rowing in a boat will do the trick!
Down Dog Shrugs: Get into down dog and work your shoulders toward your ears to strengthen the upper fibers of the trapezius!
Lower Trapezius: Upward dog will strengthen the lower fibers of the trapezius if you work your shoulder blades down your back.
Anatomy of the Back Muscles
Pg 128, Chapter 10: The Errector Spinae Group
Boney Landmarks
- Spinous Process: The Back boney protrusion that sticks out – when you round your back these are what you see sticking out under the skin.
- Transverse Process: You can’t see these, they are the part of the vertebra that sticks out on the sides
- Costals: The Bones of the Ribs
The Muscles
Errector Spinae
- Spinalis: One of the Erector Spinae – The Spinalis runs from one spinous process to the next. It runs up the center – it is to the other two Erectors. This muscle extends the spine.
- Longissimus: Latteral to the spinals is another Erector Spinae muscles who’s job is to extend the spine as well.
- Iliocostalis: The easier of the Errector Spinae to remember becuase the name defines where it is – it runs from the ilium to the Costals. Like the Longissimus and Spinals it helps extend the spine and perhaps more accurately it pulls the ribs down toward the ilium. It is more lateral than the other two.
When any of these three muslces activate on one side only they can serve to latterally bend the spine and potentially assist or initiate a twist. When both sides are active they extend the spine (create a back bend). Activating these also help to maintain upright posture when seated.
Quadratus Lumborum “Q.L.”: Not considered to be one of the erector spinae muscles but does a similar action of extension of the spine. This muscles I important in keeping the pelvis upright when seated. For supine back bends it is one of the most important to getting the body to rise away from the ground right there with the Gluteus maximus and hamstrings.
Exercises for Strength and Awareness
Baby Cobra: I absolutely love this exercises. Going super slow and harnessing a focus and attention on each vertebrae can be so meditative. The goal is not to go deep but rather to build awareness of muscles that control each vertebrae. Please take your time with this one and repeat, there is so much wisdom to be gained from this.
Reverse Plank Pose: I used to avoid this posture, but I love it now because of how much strength is required int he QL and Errector Spinae. For some time I avoided strengthening my QL by constantly tucking my tailbone in back bends – thinking lumbar extension was bad. I didn’t know any better, that’s what my teachers told me. One of my teachers who was a Spinal Specialist noticed this pattern and put two fingers on either side of my lumbar in full wheel and said “these muscles are asleep, activate them”. Suddenly my hips shot upward and my posture deepened without any discomfort at all, infuse it felt magnificent. The area she touched had not been trained or paid attention to, and now I could finally feel it! That said, Full Wheel is an extreme pose to learn to activate the erectors and QL, Reverse Plank is far more accessible which is why I chose to share that with you here.