The Interior and Exterior Lines

There are two major regions of our body; One is Yin the other is Yang.

The Yin relates to the regions closest to the anterior mid line, which includes the inside portions of the arms and legs, the abdomen and front of the chest.

Because these regions relate to all forces and movement towards the front and center of the body they are considered the interior lines of force (or the Interior Line for short)

The Interior Line directly connects with the energy of the Anterior Center Line. As an example Qigong posture that involve: bending forward, collapsing the chest, rolling the shoulders inward, turning the feet and legs inward significantly enhances the energy being delivered to the Center Line

These interior lines relates to the: Yin Motility and Yin Linking Vessels

The yin linking and Yin Motility Vessels

Represent the medial musculature of the body.foot - Inner foot, calf, thigh – arm- palm, inner forearm, inner upper armtorso - central abdominal region, chest

Head – front of the neck and face

Musculature componenets of the vessels

Yin Linking Vessel- Tibialis, Quadracepts, Psoas, Illius, rectus abdominus, internl oblique, pectoralis major, sternocleidomastoid, masseter. Hallucis longus and brevis, biceps brachii, anterior deltoid, pectoralis major

Yin Motility vessel– Plantaris, Soleus, adductors, medial aspect of the psoas, medial aspect of rectus abdominus, deep spinal muscles, inner eye and front of forehead. Flexor carpi radialis and pllicus longus, medial aspect of biceps brachii, subscapularis, pectoralis minor, latissimus dorsi.

The Yang is the outer region of the body, which includes: the outside portions of the arms and legs and the back. (The back includes the sides of the torso)

The outer regions relate to all forces and movement away from the front and towards the back and thus can be considered the Exterior lines of force (or the Exterior Line for short)

The Exterior Line is the outer region of the body that include the outer portions of the limbs and the lateral and posterior torso.

In opposition to the Interior Line the Exterior Line directly connects with the energy of the Posterior Center Line (the center line as it relates to the back). Therefore a Qigong posture that involves: bending backwards, opening the chest, rolling the shoulder backwards, turning the feet and legs outward significantly enhances the energy being delivered to the Back and posterior Center Line

These Exterior Lines relates to the: Yang Motility Vessel and Yang Linking Vessel.

Yang Linking and Yang Motility Vessel

Represent the lateral musculature of the body.Leg – Outer foot, calf and thigh, side of hips and gluteal regionArm – palm, outer forearm and upper arm, top of shoulder and shoulder blade

Torso – Side or Abdomen, Costal region, Back

Head – Side of head and neck and back of head and neck

Muscular components of the Vessels

Yang Linking Vessel– Gastrocnemius, Hamstrings, gluteals, Erector Spinai, posterior aspect of masseter, flexor and extensor carpi ulnaris, triceps, posterior deltoid, infra-spinatous, teres major and minor, levator scapula, rhomboids and the middle and lower portions of the trapezius.

Yang Motility Vessel– fibularis, lateral aspect of Quadrecepts, Illeotibial band, tensor fascial latta, gluteus minimus, external rotators, internal and external oblique, serratus anterior and posterior. Brachiradialis, extensors digitorum, triceps, medial deltoid, upper trapezius, scalenes, lateral aspect of head, inner eye

Both the Interior and Exterior Lines represent the balance of the opposing sides of the body. The activation of one side affects the other: Bending forward from the waist contracts the abdomen and chest while expanding the back and neck. Flexing backwards contracts the back while stretching the chest and abdomen

Over development of one line represents underdevelopment of another. As an example: when the exterior lines are overworked or overdeveloped there is increased tension on the lower back and outside of the knees and a deficiency on the inner thighs and lower abdomen. This is a common case in lower back pain and knee pain. The remedy from a Qigong standpoint is to strengthen in interior lines

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