The USDA created the food pyramid to encourage a healthy diet, but the USDA also has a mission to encourage agricultural products grown in the US. There can be a LOT of conflict between those two goals. So the food pyramid (ahem, I mean MyPlate) is not simply an objective summary of the available evidence.
The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length. When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.
Moro reflex. A reflex elicited by moving the neonate's head downward suddenly and then releasing it. This causes symmetric extension and abduction of the arms, fanning of the fingers, followed by the flexion of the upper extremities in an embracing movement. Legs may flex weakly.symmetrical tonic neck reflex/ tonic labyrinthine reflex/ Fencer response. When the head of the neonate is turned to one side, the arm and leg on that side extend and the arm and leg on the opposite side flex. Disappears by 6 months.