A thin, light-sensitive multilayered pink membrane, the thickness of an onion skin and the size of a postage stamp, lining the inner posterior chamber of the eyeball. The retina itself is lined with a black pigment (melanin) like the inside of a camera is black so as lessen the amount of reflection. This mesh-like tissue …
Author Archives: Brian Hopkins
Resultant
A single force or velocity producing the same effect as the two or more forces or velocities acting in concert . See Force, Velocity
Reticulospinal tract
Together with tectospinal tract, vestibulospinal, and ventral corticospinal tract forms the ventromedial group of the descending cortical pathway‚a¶ Arises from the reticular formation. See Corticopspinal tract (CST), Mesencephalic reticular activating system, Tectospinal tract, Vestibulospinal tract
Resting-state fMRI
Amethod of functional MRI that is used to measure brain functional organization. This technique is often employed to measure neural interactions present when aparticipant is not performing an explicit task. Resting-state encompasses manyphysiological and brain states, including naturally sleeping infants, fetusesin unconstrained states, unconscious individuals, and participants instructedto rest quietly but remain awake. The latter …
Responsiveness
The extent that an individual responds to the communications or behaviour of a partner in interpersonal interaction . See Sensitivity (attachment theory)
Response inhibition tasks
Tasks where the directed response to a number of cues is not to respond, and often used in tests of frontal lobe function. See Executive function, Frontal cortex, Go/no go test, Inhibitory control, Motor inhibition, Object reversal test, Prefrontal cortex
Respiratory distress syndrome (RDS)
A respiratory disorder in preterm infants due to an immature surfactant system. The deficiency in surfactant results in a collapse of he gas-exchange units of the lungs and an increase of lung compliance. There are two sorts of RD Idiopathic respiratory distress (IRDS) or hyaline membrane disease when the lungs become lined with a glassy-like …
Respiratory acidosis
This form of acidosis reflects an abnormally high acidity (i.e., an excess hydrogen-ion concentration) of the blood and other body tissues due to and increase in the acidity of the body’s fluids resulting from an accumulation of acids or by depletion of bicarbonates. It occurs when the alveolar exchange of carbon dioxide is impeded as …
Resilience
The ability to adjust effectively in the face of adverse life circumstances. According to findings from the Kauai study, started in 1954 and directed by Emmy E. Werner, the environment of children classified as resilient contains the following properties: four or less children in the family, birth spacing of more than two years between siblings, strong …
Residence patterns
whether individuals live with paternal kin or maternal kin.