Many children do develop speech sounds over time but those who do not often need the services of an SLP to learn correct speech sounds. Some speech sound errors can result from physical problems, such as: 1  developmental disorders (e.g.,autism). 2  genetic syndromes (e.g., Down syndrome).
adjective. 1  The definition of anergic is a condition in which the body fails to react to an injected antigen. 2  The definition of anergic is a condition in which the body fails to react to an injected antigen. A child whose body does not react properly to an immunization is anergic.
By blocking these adrenergic substances, which cause constriction of blood vessels and increased cardiac output, adrenergic blocking agents produce a dilatation of the blood vessels and a decrease in cardiac output. adrenergic nerves. see adrenergic (1) (above).adrenergic nervous system. see sympathetic nervous system.drenergic. 1. activated by, characteristic of, or secreting epinephrine or related substances, particularly the sympathetic nerve fibers that liberate norepinephrine at a synapse when a nerve impulse passes.