Skip to main content
. Author manuscript; available in PMC: 2015 Dec 1.
Published in final edited form as: J Shoulder Elbow Surg. 2014 May 28;23(12):1786–1791. doi: 10.1016/j.jse.2014.03.002

Figure 3.

Figure 3

Infraspinatus muscle architectural features increase as a function of animal mass (age), except for sarcomere length, which remains constant over the lifespan. Muscle mass (A) (y = 0.0009x + 0.0493, r2 = 0.954, p < 0.0001) increases linearly, normalized muscle fiber bundle length (B) (y = 2.0693ln(x) - 1.8853, r2 = 0.783) increases non-linearly, sarcomere length (C) does not change (r2 = 0.000252, p = 0.932), and physiological cross-sectional area (PCSA) (D) (y = 0.0007x + 0.0957, r2 = 0.884, p < 0.0001) increases linearly as a function of total body mass.