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AXONAL TRANSPORT

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

refers to the transportation of materials along the axon of a neuron. Materials may be directed from the cell body to distant regions of the dendrites, or conversely, from the axon terminals back to the cell body. Also known as axoplasmic flow.

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AXOPLASM

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to the axis cylinder in a neuron

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AXOPLASMIC TRANSPORT, AXONAL VARICOSITIES

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

refers to enlarged areas of an axon that contain synaptic vesicles and also release neurotransmitter molecules.

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AXOTOMY

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to the severing of an axon. Denervation of this type is often used in experimental studies of neurophysiology, in order to model certain diseases of the nervous system.

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AYAHUASCA

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to a powerful hallucinogenic beverage made from the stems of a tropical South American woody vine, Banisteriopsis caapi. This substance has been used for centuries by indigenous peoples of the Amazon for religious, spiritual, and medicinal purposes. More recently in the United States, it has been used to evoke anomalous experiences. The active ingredients are harmine and harmaline. In smaller doses, these ingredients have hallucinogenic and euphoric effects but in larger doses may cause nausea and vomiting, tinnitus, and collapse, followed by sedation. Also known as caapi.

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AYURVEDA

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to a holistic system of healing, which originated and has been practiced primarily in the Indian subcontinent. It has spread to some extent to Western cultures. This includes diet and herbal remedies and emphasizes the use of body, mind, and spirit in disease prevention and treatment.

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AZASPIRONES

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to a class of non-benzodiazepine anxiolytics for which the prototype is buspirone. These drugs relieve anxiety by acting as partial agonists at the 5-HT 4 serotonin receptor (see serotonin-receptor agonists). Other drugs in this class include gepirone, tandospirone, and ipsapirone. Azaspirones produce less sedation than the traditional benzodiazepines and they lack the abuse potential. However, their onset of action is approximately 2-3 weeks, and therefore, they cannot be used to manage acute or paroxysmal anxiety. Also known as azaspirodecanediones.

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AZATHIOPRINE

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to a drug that is used to suppress the immune response, in order to support organ transplantation and other potentially severe cases of immune reactions. U.S. trade name (among others): Imuran.

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AZOOSPERMIA

Written by Pam MS, NCSP | Fact checked by Psychology Dictionary staff 

n. refers to the absence of viable sperm in the semen, usually as a result of failed spermatogenesis.

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