Benchpress grip

[bentzurm]

In SS Rippetoe & Kilgore wrote regarding the thumb-over grip in the BP:
"Squeezing involves closing the thumb and fingers around the bar until effective pressure can be applied with the forearm muscles in isometric contraction, increasing the tightness of the muscles on the forearm side of the elbow, making rebound out of the bottom more efficient, and increasing motor unit recruitment throughout the arms and upper body"

I'm hunting down a reference (either pubmed article or citation from a kinesiology textbook) for the motor recruitment increase. If anyone has this I'll be very thankful.

p.s.
Thanks Mark for all your work.

[Mark Rippetoe]

Why would a kinesiology textbook reference be okay, but the reference from SS:BBT be inadequate? Neither would be from "peer-reviewed" research, and would thus not be a primary reference.

[bentzurm]

Why would a kinesiology textbook reference be okay, but the reference from SS:BBT be inadequate? Neither would be from "peer-reviewed" research, and would thus not be a primary reference.

Either one would be okay because I'm just trying to learn more about this. Any information source that elaborates more on the increased motor recruitment due to grip will be beneficial.

[Mark Rippetoe]

If either one would be okay, just use SS:BBT as your reference.

[jtorres3]

Irradiation,
As explained by Pavel:
"the Law of Irradiation. It states that a muscle working hard recruits the neighboring muscles, and if they are already a part of the action, it amplifies their strength! Not by cheating, as some complement their barbell curls with a back swing, but by cheering. The neural impulses emitted by the contracting muscle reach other muscles and turn them on as electric current starts a motor. "

As found in a physioglogy texbook:
"Law of Irradiation When an excitation has produced a reflex movement in the muscles of one side by a first degree of irradiation there will be reflex movements in the corresponding muscles of the opposite side

Cutaneous constriction by cold applied to the right hand determines constriction by the vasomotors of the left hand as well

These are examples of the type known as transverse irradiation

If the excitation be more intense the movement is spread into the muscles situated above and below the point of excitation This represents the longitudinal irradiation

[Mark Rippetoe]

There you have it, bent.

[bentzurm]

Thanks for the lead, jtorres3, I was missing the technical term and now I can follow this up by myself.
Rip, maybe I threw you off when I said I'm looking for a reference. I'm looking to read more about this, so SS is not helpful in this, as it only mentions it in passing (which piqued my interest) but does not elaborate on this. Not a critique of SS in any form.