The platysma changes the facial expression which plays an important role in human social behavior. In elderly people â when the skin increasingly loses its elasticity â both inner faces of the platysma form two longitudinal wrinkles on the neck.
Biological psychology is a branch of psychology that studies the physiological causes of behavior. This field is sometimes referred to as behavioral neuroscience or biopsychology.
Full Definition of BIOLOGICAL. 1. : of or relating to biology or to life and living processes. 2. : used in or produced by applied biology. 3.â biÂ·oÂ·logÂ·iÂ·calÂ·ly \-ji-k(É-)lÄ\ adverb. See biological defined for English-language learners.See biological defined for kids.ull Definition of BIOLOGICAL. 1. : of or relating to biology or to life and living processes. 2. : used in or produced by applied biology. 3. â biÂ·oÂ·logÂ·iÂ·calÂ·ly \-ji-k(É-)lÄ\ adverb.