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The muscles connected to the ears of a human do not develop enough to have the same mobility allowed to monkeys. Arrows show the vestigial structure called Darwin's tubercle. In the context of human evolution, vestigiality involves those traits occurring in humans that have lost all or most of their original function through evolution. Although ...
Vestigiality is the retention, during the process of evolution, of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. [1] Assessment of the vestigiality must generally rely on comparison with homologous features in related species.
Evolutionary psychology proposes that the human psychology consists primarily of psychological adaptations, [2] which is opposed by the tabula rasa or blank slate model of human psychology. Early behaviourists, like B.F. Skinner , tended to the blank slate model and argued that innate behaviors and instincts were few, some behaviourists ...
This phenomenon is an automatic-response mechanism that activates even before a human becomes consciously aware that a startling, unexpected or unknown sound has been "heard". [2] That this vestigial response occurs even before becoming consciously aware of a startling noise would explain why the function of ear-perking had evolved in animals.
Early embryos of various species display some ancestral features, like the tail on this human embryo. These features normally disappear in later development, but it may not happen if the animal has an atavism.
The homunculus is commonly used today in scientific disciplines such as psychology as a teaching or memory tool to describe the distorted scale model of a human drawn or sculpted to reflect the relative space human body parts occupy on the somatosensory cortex (the sensory homunculus) and the motor cortex (the motor homunculus).
Maladjustment is a term used in psychology to refer the "inability to react successfully and satisfactorily to the demand of one's environment". [1] The term maladjustment can be referred to a wide range of social, biological and psychological conditions. [2] Maladjustment can be both intrinsic or extrinsic.
Vestigiality, genetically determined structures or attributes that have lost some or all of their ancestral function Topics referred to by the same term This disambiguation page lists articles associated with the title Vestiges .