Psychological Stress Alters Ultrastructure and Energy Metabolism of Masticatory Muscle in Rats

Figure 5

The activities of Na⁺-K⁺ATPase, Ca²⁺-ATPase, and lactate dehydrogenase (LDH) and the contents of lactic acid (LD) of the masticatory muscle. Shown are the activities of the enzymes Na⁺-K⁺ATPase (a), Ca²⁺-ATPase (b), and Lactate dehydrogenase (c) as well as the contents of lactic acid (d) in the masticatory muscles from the control (CON) and psychological (PS) groups detected by colorimetric methods. Data were expressed as 𝑋± SE and analyzed in eight rats from each group (*P <  .05, PS group versus CON group).

(a)

(b)

(c)

(d)