Hand Anatomy Quiz
Test your knowledge of the bones of the hand including carpals, metacarpals, and phalanges.
- How many bones are in the human hand?
Answer: C — The hand has 27 bones including carpals, metacarpals, and phalanges.
- What are the wrist bones called?
- A. Tarsals
- B. Carpals
- C. Phalanges
- D. Metatarsals
Answer: B — Carpals are the small bones forming the wrist.
- How many carpals are there?
Answer: C — There are 8 carpal bones arranged in two rows.
- The bones in the fingers are called:
- A. Metacarpals
- B. Phalanges
- C. Carpals
- D. Tarsals
Answer: B — Phalanges make up the fingers.
Hand Anatomy Study Guide
The hand contains 27 bones and is one of the most important anatomy regions for healthcare students to understand. This guide reviews the carpals, metacarpals, phalanges, joints, memory tricks, and common clinical connections.
Quick fact: Each hand has 8 carpals, 5 metacarpals, and 14 phalanges.
Hand Bones Overview
| Region | Number | What to Remember |
|---|
| Carpals | 8 | Small wrist bones arranged in proximal and distal rows. |
| Metacarpals | 5 | Palm bones numbered 1–5 from thumb to little finger. |
| Phalanges | 14 | Finger bones. Each finger has 3 except the thumb, which has 2. |
The 8 Carpal Bones
The carpal bones are commonly tested in anatomy, radiology, and healthcare courses.
| Proximal Row | Distal Row |
|---|
| Scaphoid | Trapezium |
| Lunate | Trapezoid |
| Triquetrum | Capitate |
| Pisiform | Hamate |
Memory trick: Some Learners Try Positions That They Can't Handle.
Clinical Connections
- Scaphoid fracture: Common wrist fracture after falling on an outstretched hand.
- Carpal tunnel: Involves compression of the median nerve at the wrist.
- Boxer's fracture: Often affects the 5th metacarpal neck.
- Trigger finger: Tendon movement problem that can cause catching or locking.
- Dupuytren contracture: Thickening of palmar fascia causing finger flexion.
Expanded Hand Anatomy Practice Questions
- Which carpal bone is commonly fractured after a fall on an outstretched hand?
- A. Scaphoid
- B. Femur
- C. Talus
- D. Patella
Answer: A — The scaphoid is a commonly fractured carpal bone.
- How many metacarpals are in one hand?
Answer: B — There are 5 metacarpals in each hand.
- How many phalanges are in one hand?
Answer: C — Each hand has 14 phalanges.
- Which finger has only two phalanges?
- A. Index finger
- B. Middle finger
- C. Ring finger
- D. Thumb
Answer: D — The thumb has proximal and distal phalanges only.
- Which nerve is associated with carpal tunnel syndrome?
- A. Median nerve
- B. Femoral nerve
- C. Sciatic nerve
- D. Optic nerve
Answer: A — Carpal tunnel syndrome involves compression of the median nerve.
- Which bones form the palm?
- A. Carpals
- B. Metacarpals
- C. Tarsals
- D. Ribs
Answer: B — Metacarpals form the palm of the hand.
- Which carpal bone is the largest?
- A. Capitate
- B. Pisiform
- C. Lunate
- D. Hamate
Answer: A — The capitate is the largest carpal bone.
- Which carpal bone is pea-shaped?
- A. Pisiform
- B. Trapezium
- C. Scaphoid
- D. Capitate
Answer: A — The pisiform is a small pea-shaped carpal bone.
- What is the total number of bones in both hands?
Answer: C — Each hand has 27 bones, so both hands have 54.
- The distal phalanges are located where?
- A. Wrist
- B. Palm
- C. Fingertips
- D. Forearm
Answer: C — Distal phalanges form the fingertips.
Hand Joints & Ligaments
The hand contains numerous joints that allow precise movement.
| Joint | Function | Clinical Note |
|---|
| Radiocarpal | Flexion/extension | Common wrist injuries |
| CMC | Thumb opposition | Arthritis common |
| MCP | Knuckle motion | Frequently injured |
| PIP/DIP | Finger motion | Tendon injuries |
Hand Muscles to Know
- Thenar muscles move the thumb.
- Hypothenar muscles move the little finger.
- Lumbricals flex MCP joints.
- Interossei abduct/adduct the fingers.
Practice Questions (15–25)
- Which joint allows thumb opposition?
Answer: Carpometacarpal (CMC) joint.
- Which muscle group controls the thumb?
Answer: Thenar muscles.
- Which muscle group controls the little finger?
Answer: Hypothenar muscles.
- Which joints are the knuckles?
Answer: MCP joints.
- Which nerve passes through the carpal tunnel?
Answer: Median nerve.
- Which structure forms the roof of the carpal tunnel?
Answer: Flexor retinaculum.
- How many MCP joints are in one hand?
Answer: Five.
- Which movement is unique to the thumb?
Answer: Opposition.
- Which fingers have middle phalanges?
Answer: Digits 2–5.
- Primary function of the interossei?
Answer: Finger abduction and adduction.
- Which carpal commonly articulates with the radius?
Answer: Scaphoid.
Tendons, Nerves & Blood Supply
The hand's precise movement depends on flexor and extensor tendons, three major nerves, and a rich arterial supply.
| Structure | Function |
|---|
| Median nerve | Thumb, index, middle finger sensation and thenar muscles. |
| Ulnar nerve | Most intrinsic hand muscles and little finger sensation. |
| Radial nerve | Extension and dorsal hand sensation. |
| Flexor tendons | Finger flexion. |
| Extensor tendons | Finger extension. |
| Superficial & Deep Palmar Arches | Main arterial blood supply. |
Common Hand Injuries & Imaging
- Scaphoid fractures may not appear on initial X-rays.
- Boxer's fractures involve the 5th metacarpal.
- Mallet finger affects the extensor tendon.
- Jersey finger affects the flexor tendon.
- MRI is useful for soft tissue injuries; X-ray is best for fractures.
Practice Questions (26–35)
- Which nerve is most often affected in carpal tunnel syndrome?
Answer: Median nerve.
- Which nerve supplies most intrinsic hand muscles?
Answer: Ulnar nerve.
- Which imaging study is usually first for suspected fractures?
Answer: X-ray.
- Which imaging study better evaluates tendons?
Answer: MRI.
- Which tendon injury causes mallet finger?
Answer: Extensor tendon.
- Which injury commonly affects the 5th metacarpal?
Answer: Boxer's fracture.
- What supplies blood to the palm?
Answer: Superficial and deep palmar arches.
- Which nerve is commonly tested by thumb opposition?
Answer: Median nerve.
- What tendon bends the fingers?
Answer: Flexor tendons.
- What tendon straightens the fingers?
Answer: Extensor tendons.
Hand Anatomy Clinical Case Studies
Use these short scenarios to connect anatomy terms to real-world healthcare thinking.
- Case 1: A patient falls on an outstretched hand and has pain near the anatomical snuffbox. Think scaphoid fracture.
- Case 2: Numbness and tingling affect the thumb, index, and middle fingers. Think median nerve and carpal tunnel.
- Case 3: A patient cannot extend the tip of the finger after injury. Think mallet finger and extensor tendon injury.
- Case 4: Pain and deformity occur near the 5th metacarpal after punching an object. Think boxer's fracture.
Hand Anatomy Quick Reference
| Topic | High-Yield Fact |
|---|
| Total hand bones | 27 per hand |
| Carpals | 8 wrist bones |
| Metacarpals | 5 palm bones |
| Phalanges | 14 finger bones |
| Median nerve | Carpal tunnel syndrome |
| Ulnar nerve | Most intrinsic hand muscles |
| Radial nerve | Extension-related function |
Practice Questions (36–50)
- Pain in the anatomical snuffbox after a fall suggests injury to which bone?
Answer: Scaphoid.
- Which condition involves compression of the median nerve?
Answer: Carpal tunnel syndrome.
- Which fracture is commonly associated with the 5th metacarpal?
Answer: Boxer's fracture.
- Loss of fingertip extension suggests injury to which tendon group?
Answer: Extensor tendon.
- Which nerve is associated with sensation to the little finger?
Answer: Ulnar nerve.
- Which row contains the scaphoid and lunate?
Answer: Proximal carpal row.
- Which row contains the trapezium and capitate?
Answer: Distal carpal row.
- Which bone is at the base of the thumb?
Answer: First metacarpal.
- Which joint is commonly involved in thumb arthritis?
Answer: Thumb CMC joint.
- Which test checks blood flow through radial and ulnar arteries?
Answer: Allen test.
- Which tendon injury prevents flexion of the fingertip?
Answer: Jersey finger.
- Which bones are distal to the metacarpals?
Answer: Phalanges.
- What is another name for finger bones?
Answer: Phalanges.
- What type of joint movement allows the thumb to touch the fingers?
Answer: Opposition.
- Which nerve is commonly tested by wrist extension?
Answer: Radial nerve.
Surface Anatomy & Palpation Landmarks
Being able to identify landmarks by touch is important for anatomy courses and clinical practice.
| Landmark | Clinical Importance |
|---|
| Anatomical Snuffbox | Scaphoid tenderness after a fall. |
| Thenar Eminence | Thumb muscle bulk; median nerve function. |
| Hypothenar Eminence | Little finger muscle group. |
| Palmar Creases | Useful orientation during physical exams. |
| Flexor Tendons | Assess finger flexion after injury. |
Common Hand Conditions
- Carpal tunnel syndrome
- De Quervain tenosynovitis
- Trigger finger
- Dupuytren contracture
- Gamekeeper's (Skier's) thumb
- Mallet finger
- Jersey finger
Practice Questions (51–65)
- Which landmark is palpated when evaluating a possible scaphoid fracture?
Answer: Anatomical snuffbox.
- Which muscle group forms the thenar eminence?
Answer: Thenar muscles.
- Which condition commonly compresses the median nerve?
Answer: Carpal tunnel syndrome.
- Which tendon disorder causes the thumb side of the wrist to become painful?
Answer: De Quervain tenosynovitis.
- Which condition causes finger locking during flexion?
Answer: Trigger finger.
- Which structure should be tested after a finger laceration?
Answer: Flexor and extensor tendons.
- What movement should be tested for median nerve function?
Answer: Thumb opposition.
- What movement is controlled primarily by the radial nerve?
Answer: Wrist and finger extension.
- Which hand bone is most frequently fractured?
Answer: Scaphoid.
- Which hand contains 27 bones?
Answer: Every normal human hand.
- Which artery contributes to the superficial palmar arch?
Answer: Ulnar artery.
- Which artery contributes to the deep palmar arch?
Answer: Radial artery.
- Which test evaluates collateral circulation of the hand?
Answer: Allen test.
- What type of imaging best detects most fractures initially?
Answer: X-ray.
- What imaging modality best evaluates tendon injuries?
Answer: MRI.
Hand Anatomy FAQ
How many bones are in the hand?
Each hand has 27 bones: 8 carpals, 5 metacarpals, and 14 phalanges.
What are the wrist bones called?
The wrist bones are called carpals.
What are the finger bones called?
The finger bones are called phalanges.
What is the most commonly fractured carpal bone?
The scaphoid is one of the most commonly fractured carpal bones.
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