To close the hand and place the thumb outside upon the index finger, signifies conflict. This is the concentro-concentric hand.
To bend the first joint with the fingers somewhat apart, indicates the eccentro-concentric hand. This is the convulsive state.
Let us pass on to the eccentric genus.
The fingers somewhat spread, denote the normo-eccentric hand. This is exaltation.
To spread the fingers and fold them to the second joint, indicates the concentro-concentric hand. This is retraction.
To spread the fingers as much as possible, gives the eccentro-eccentric hand. This is exasperation.
In the subjoined charts we can see an illustration of the different attitudes of the hand.
| II | { | 2 | { | Concentro-concentric. | Conflict. |
| 3 | Normo-concentric. | Tonic or power. | |||
| 1 | Eccentro-concentric. | Convulsive. | |||
| III | 2 | { | Concentro-normal. | Prostration. | |
| 3 | Normo-normal. | Abandon. | |||
| 1 | Eccentro-normal. | Expansion. | |||
| I | 2 | { | Concentro-eccentric | Retraction. | |
| 3 | Normo-eccentric. | Exaltation. | |||
| 1 | Eccentro-ececntric. | Exasperation. |
The nine primitive forms of the hand are, as is seen, undetermined.