Answer:
This is synaptic pruning- it removes them
Explanation:
The gaps and the portions of neurons between adjacent neurons is called synapse.It role is to moderate synaptic connections among neurons.
As organisms (man and other higher animals)develop from birth to adult,new synaptic connections are formed,and old ones are removed.The process whereby the the axon and dendrite, as part of the synapse, decay and removed by the brain is called synaptic pruning or pruning process.
This process begins at childhood and continue till maturity- at mid twenties.it occurs during sleep.
it helps to improve learning and memory,because new connections are made to replace the old ones,and therefore smooth transition of the brain from childhood to adulthood
Three models have been used to explain pruning-Axon degeneration,retraction and Axon shedding.
You have to explain to him how he/she deserves better and tell them that life will be so much better if they leave the relationship (if they haven’t) and have them block the person on all social media.
That is true. According to studies done in the early 1990s, the most experienced or shared experience as a young adult was a sense of identity.
Answer:
Explanation:
Forehand groundstroke effectiveness is important for tennis success. Ball topspin angular velocity (TAV) and accuracy are important for fore hand groundstroke effectiveness, and have been extensively studied, previously; despite previous, quality studies, it was unclear whether certain racquet kinematics relate to ball TAV and shot accuracy during the forehand groundstroke. This study evaluated potential relationships between (1) ball TAV and (2) forehand accuracy, and five measures of racquet kinematics: racquet head impact angle (i.e., closed or open face), horizontal and vertical racquet head velocity before impact, racquet head trajectory (resultant velocity direction, relative to horizontal) before impact, and hitting zone length (quasi-linear displacement, immediately before and after impact). Thirteen collegiate-level tennis players hit forehand groundstrokes in a biomechanics laboratory, where racquet kinematics and ball TAV were measured, and on a tennis court, to assess accuracy. Correlational statistics were used to evaluate potential relationships between racquet kinematics, and ball TAV (mixed model) and forehand accuracy (between-subjects model; α = 0.05). We observed an average (1) racquet head impact angle, (2) racquet head trajectory before impact, relative to horizontal, (3) racquet head horizontal velocity before impact, (4) racquet head vertical velocity before impact, and (5) hitting zone length of 80.4 ± 3.6˚, 18.6 ± 4.3˚, 15.4 ± 1.4 m·s-1, 6.6 ± 2.2 m·s-1, and 79.8 ± 8.6 mm, respectively; and an average ball TAV of 969 ± 375 revolutions per minute. Only racquet head impact angle and racquet head vertical velocity, before impact, significantly correlated with ball TAV (p < 0.01). None of the observed racquet kinematics significantly correlated to the measures of forehand accuracy. These results confirmed mechanical logic and indicate that increased ball TAV is associated with a more closed racquet head impact angle (ranging from 70 to 85˚, relative to the ground) and increased racquet head vertical velocity before impact.
