Topic Overview

 

🧠 Mnemonics – Chapter: Forearm and Hand

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1. Superficial Flexor Muscles of Forearm (Lateral → Medial)

👉 Mnemonic: “Pass–Fail–Pass–Fail”

• P → Pronator teres

• F → Flexor carpi radialis

• P → Palmaris longus

• F → Flexor carpi ulnaris

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2. Deep Flexor Muscles of Forearm

👉 Mnemonic: “F-F-P”

• F → Flexor digitorum profundus

• F → Flexor pollicis longus

• P → Pronator quadratus

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3. Superficial Extensor Muscles (Lateral → Medial)

👉 Mnemonic: “BRAE–BRE–DI–MI–UL”

• BRA → Brachioradialis

• E → Extensor carpi radialis longus

• BRE → Extensor carpi radialis brevis

• DI → Extensor digitorum

• MI → Extensor digiti minimi

• UL → Extensor carpi ulnaris

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4. Deep Extensor Muscles

👉 Mnemonic: “Sup–Ab–EPB–EPL–EI”

• Sup → Supinator

• Ab → Abductor pollicis longus

• EPB → Extensor pollicis brevis

• EPL → Extensor pollicis longus

• EI → Extensor indicis

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5. Compartments Under Extensor Retinaculum (Lateral → Medial)

👉 Mnemonic: “22-1-22-1-1 Rule” or “AB–E–E–E–E–E”

Compartment	Tendons	Mnemonic
1	Abductor pollicis longus & Extensor pollicis brevis	(A-B)
2	Extensor carpi radialis longus & brevis	(R–R)
3	Extensor pollicis longus	(L)
4	Extensor digitorum & Extensor indicis	(D–I)
5	Extensor digiti minimi	(M)
6	Extensor carpi ulnaris	(U)

Simplified: “AB-RE-L-DI-M-U” → 1 to 6

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6. Thenar Muscles

👉 Mnemonic: “All For Opposition”

• A → Abductor pollicis brevis

• F → Flexor pollicis brevis

• O → Opponens pollicis
  (All supplied by median nerve except deep head of flexor pollicis brevis → ulnar nerve)

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7. Hypothenar Muscles

👉 Mnemonic: “All Five Oppose”

• A → Abductor digiti minimi

• F → Flexor digiti minimi brevis

• O → Opponens digiti minimi

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8. Lumbricals & Interossei Nerve Supply

👉 Mnemonic: “1–2 by Median, 3–4 by Ulnar”

• 1st & 2nd lumbricals → Median nerve

• 3rd & 4th lumbricals → Ulnar nerve

👉 Mnemonic for Interossei: “PAD–DAB”

• P → Palmar ADduct

• D → Dorsal ABduct

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9. Muscles of Thumb (Pollicis Group)

👉 Mnemonic: “All A F O E”

• A → Abductor pollicis brevis

• F → Flexor pollicis brevis

• O → Opponens pollicis

• E → Adductor pollicis

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10. Arterial Arches of Hand

👉 Mnemonic: “Superficial = Ulnar Major, Deep = Radial Major”

• Superficial Palmar Arch: mainly from ulnar artery.

• Deep Palmar Arch: mainly from radial artery.
  👉 To remember branch pattern:

• Superficial Arch → 3 common → 6 proper digital arteries.

• Deep Arch → 3 palmar metacarpal → join superficial branches.

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11. Nerve Supply of Hand (Palmar Aspect)

👉 Mnemonic: “Lateral 3½ = Median; Medial 1½ = Ulnar”

• Median nerve → thumb, index, middle, and radial half of ring finger.

• Ulnar nerve → little finger and ulnar half of ring finger.

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12. Ulnar Nerve – Muscles Supplied in Hand

👉 Mnemonic: “All by Ulnar except LOAF”

• L → Lateral two lumbricals

• O → Opponens pollicis

• A → Abductor pollicis brevis

• F → Flexor pollicis brevis (superficial head)
  (All other intrinsic hand muscles by ulnar nerve)

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13. Radial Nerve – Extensor Muscle Supply

👉 Mnemonic: “B–E–E–E–E–E–E–E–E”

• B → Brachioradialis

• E → Extensors (ECRL, ECRB, ED, EDM, ECU, APL, EPB, EPL, EI)

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14. Carpal Tunnel Contents

👉 Mnemonic: “9 Tendons + 1 Nerve”

• 9 Tendons:

  • 4 of FDS

  • 4 of FDP

  • 1 of FPL

• + Median nerve

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15. Dorsal Digital Expansion Attachments

👉 Mnemonic: “C for Central, L for Lateral”

• Central slip → to base of middle phalanx.

• Lateral slips → unite and insert into base of distal phalanx.