Left hand guitar mechanics

Fingers

Okay guitar mechanics but:

fingers are slanted or angled and not perpendicular to the fretboard. Could cause for buzzing strings or misfretting.

Better left hand technique:

fingers are rounded and tips are close to are at perpendicular to the fretboard.

Wrist

No good:

wrist is hyper extended or twisted.

Good left hand guitar technique:

wrist is slightly arched and perpendicular to the forearm. Look at the picture below left.

Elbow

No good:

too close to the body, using this joint to move up and down the fretboard. Creates pressure on the wrist.

Good:

elbow is used to move vertically up and down the strings and not horizontally.

Shoulder

No good:

shoulder dips to accommodate the neck position, causes misalignment of the spine

Good:

shoulder rotates the arm up and down and is used to move the armup and down the neck of the guitar,adjusts the neck as needed.