Muscles that take action on the thumb, together form the thenar eminence at base of digit 1:

Flexor Pollicis Brevis

Abductor Pollicis Brevis

Opponens Pollicis

Muscles that take action on digit 5, together form the hypothenar eminence at base of digit 5: 

Flexor Digiti Minimi

Abductor Digiti Minimi

Opponens Digiti Minimi

Located in the middle palm, various action on digits 2-5:

Adductor Pollicis

Dorsal Interossei

Palmar Interossei

Lumbricales

O: Trapezium and flexor retinaculum

I: Base of 1st proximal phalanx

A: MCP flexion digit 1

CMC flexion digit 1

O: Scaphoid, trapexium, and flexor retinaculum

I: Base of 1st proximal phalanx

A: CMC abduction digit 1

O: Trapezium and flexor retinaculum

I: Lateral surface of the 1st metacarpal

A: Opposition of digit 1

O: Hook of the hamate and flexor retinaculum

I: Base of the 5th proximal phalanx

A: MCP flexion digit 5

O: Pisiform and tendon of the flexor carpi ulnaris

I: Base of the 5th proximal phalanx

A: MCP abduction digit 5

O: Hook of the hamate and flexor retinaculum

I: Ulnar border of 5th metacarpal

A: Opposition of digit 5

O: Capitate, base of 2nd metacarpal, palmar surface of 3rd metacarpal

I: Base proximal phalanx of thumb

A: CMC adduction digit 1

Dorsal Interossei OIA

O: Between two adjacent metacarpals

I: Base of the proximal phalanges of digits 2, 3, 4, and the extensor expansion

A: MCP abcuction digits 2-4

Assists with MCP flexion, and PIP/DIP extension digits 2-4

DAB: D orsal does

      AB duction   

O: Palmar surface of metacarpals 2,4, and 5

I: Base of proximal phalanx of same finger, and the extensor expansion

A: MCP adduction digits 2, 4, and 5

Assists with MCP flexion, and PIP/DIP extension of digits 2-4

PAD: P almar does 

      AD duction

O: Tendon of flexor digitorum profundus

I: Extensor expansion of extensor digitorum muscle at proximal phalanx

A: MCP flexion digits 2-5

PIP extension digits 2-5

DIP extension digits 2-5