Question

For each motion, identify the upper body muscles involved. Also, indicate which muscles are the agonists and which are the antogonists. Indicate nerves for each as well.

1. Throwing a dart

2. Setting a volleyball

Answer 1

1 throwing dart

Shoulder

This is the only point in the whole process that doesn't change its position. So you must not move your body when throwing. The only throwing action comes from your arm

Scapula Doesn't have any particular job but to help with Shoulder flexion

Elbow It stays in flexion when moving the dart backward, and gores into extensio in the acceleration phase.

Wrist In a neutral position at start. moves to extension and near the end point of acceleration the wrist Should Snap into flexion

Fingers USed to grip the dart and release it at the end of the wrist Snap.

Prep Phase-Aim

The process of getting Something ready for use or a particular situation.

Shoulder Flexion Subscapularis, Teres Major, Biceps Brachii, Coracobrachialis.

Elbow Flexion Biceps Brachii, Brachioradialis, Brachialis, And ProNator Teres.

Wrist Extension Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Carpi Ulnaris, And C7 Nerve Root Motor Groups.

Scapula Upward Rotation Serratus Anterior And Trapezius.

Scapula Protraction Serratus Anterior, Pectoralis Major, And Pectoralis Minor Thumb Flexion Flexor Pollicis Longus Index Finger Flexion Flexor Digitorum Profundus

Backwards Phase

The movement going opposite of the intended site; the load up phase.
Shoulder Flexion Subscapularis, Teres Major, Biceps Brachii, Coracobrachialis.

Elbow Flexion Biceps Brachii, Brachioradialis, Brachialis, And ProNator Teres.

Wrist Extension Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Carpi Olwaris, And C7 Nerve Root Motor Groups.

Scapula Upward Rotation Serratus Anterior and Trapezius.

Scapula Protraction Serratus Anterior, pectoralis Major, and Pectoralis Minor Thumb Flexion Flexor Pollicis Longus INdex FiNger FlexioN Flexor Digitorum Profundus

Acceleration !

Release Phase

The act of accelerating for the increase of Speed or velocity
Shoulder Flexion Subscapularis, Teres Major, Biceps Brachii, And Coracobrachialis.

Elbow Extension Triceps Brachii And Extensor Carpi Brevis wrist ExtensioN Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Carpi Ulnaris, And C7 Nerve Root Motor Groups.

Wrist Flexion Flexor Carpi Radialis, Palmaris Longus, Flexor Carpi Ulnaris, Flexor Digitorum Superficialis, Flexor Digitorum Profundus, And C8 Root Motor Groups.

SCapula Upward Rotation Serratus Anterior and Trapezius.

Scapula Protraction Serratus Anterior, Pectoralis Major, ANd Pectoralis Minor Thumb Flexion Flexor Pollicis longus Thumb Extension and Abduction Extensor Pollicis Longus And Extensor Pollicis Brevis.

INdex FInger FlexioN Flexor Digitorum Profundus Index Finger Extension Extensor Indicis And ExteNsor Digitorum

2 Setting

Joints . . Movement & Muscles Involved

• glenohumeral joint flex. • Flexion of the trapezius when moving arms back to set.

Flexion of the triceps when extending your arms upward while setting.

• elbow joint extends. Flexion of the biceps when arms are back. Extensor digitorum and
brachioradialis reflex when the e elbow bend   
and then extend when setting the ball.