Shoulder anatomy

Action of shoulder Muscles

Abduction: middle deltoid, supraspinatus, anterior deltiod, posterior deltoid

Adduction: pectoralis major, teres major, latissimus dorsi, long head of triceps, coracobrachialis

Extension: latissimus dorsi, teres major, subscapularis, posterior deltoid, long head of triceps

Flexion: anterior deltoid, pectoralis major, long head of biceps, coracobrachialis

External rotation: infraspinatus, teres minor, posterior deltoid

Internal rotation: subscapularis, pectoralis major, latissimus dorsi, teres major, anterior deltoid

Vertabrae of the spine

spine consists of five groups of vertabrae. These include:

1. Cervical Spine, usually consisting of seven.
2. Thoracic Spine, consiting of twelve.
   
3. Lumbar spine, usually consisting of five.
4. Sacrum. five fused vertabra.
5. Coocyx, four fused vertabrae
   

What are the benefits of stretching?

Stretching is just about the simplest of all physical activities. It is the perfect antidote for long periods of inactivity and holding still. Simplisticily speaking, regular stretching throughout the day has been noted to:

• Reduce muscle tension
• Improve circulation
• Reduce anxiety, stress, and fatigue
• Improve mental alertness
• Decrease the risk of injury
• Make your work easier
• Improve your sense of well being

For a in depth explanation of benefits, the following article maybe of interest. Click

Throughout this year stretches for each area of the body will be covered.

Knee Ligaments

The four major ligaments that support the knee include:

1. Posterior cruciate ligament PCL

2. Anterior cruciate ligament ACL

3. Medial colateral ligament

4. Lateral colateral ligament

The ACL and PCL limit the over straightening, over bending and rotation of the knee. The MCL and LCL prevent side bending.

The ligaments often get injured in the sport community.

Piriformis syndrome

Piriformis syndrome occurs when the piriformis becomes inflammed causing irritation to the siatic nerve. This is a common cause of siatica.

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