Anatomy of Hatha Yoga by Coulter David

Author:Coulter, David [Coulter, David]
Language: eng
Format: mobi, epub
Tags: Yoga/Nonfiction
Publisher: Cardinal Publishers Group
Published: 2011-08-16T04:00:00+00:00

Figure 6.2a. The gross movements of the pelvis and sacrum that are involved in sacroiliac nutation are indicated by arrows. The promontory of the sacrum is thrust forward (*), the iliac crests are shifted medially (**), and the ischial tuberosities are spread apart (***). For counternutation, the shifts are in the opposite direction: the iliac crests move laterally, the sacral promontory moves posteriorly, and the ischia move medially (from Kapandji, with permission).

Figure 6.2b. Enlargement of fig. 3.3 showing the matching rail (on the left) and groove (on the right) architecture of an idealized sacroiliac joint. Such a joint might permit up to 10° of slippage (essentially a rotation) between full nutation and full counternutation. The pelvic bone (left) has been disarticulated from the sacrum (right) and flipped horizontally to reveal the articular surfaces and to suggest how a healthy sacroiliac joint could permit this much movement (Sappey).

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