Frequency (kHz)

Figure 76.4 ABR recordings were made from CBA mice. ABR thresholds were measured for frequencies of 3, 6, 12, 24, 32, and 48 kHz. Young adult mice have good sensitivity up to 48 kHz, with the best sensitivity in the 5-30 kHz range, and no male/female differences. As mice age, sensitivity declines, and CBA mice tend to have relatively good hearing sensitivity even in old age. A. Young adult thresholds. B. Middle-aged data show few differences between the sexes. C. Old recordings show lower thresholds for females, but this difference was not statistically significant. From Guimaraes et al. (2004), with permission.

Blood Pressure Health

Blood Pressure Health

Your heart pumps blood throughout your body using a network of tubing called arteries and capillaries which return the blood back to your heart via your veins. Blood pressure is the force of the blood pushing against the walls of your arteries as your heart beats.Learn more...

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