Podcast
Questions and Answers
What is the number of wrist bones and their arrangement?
What is the number of wrist bones and their arrangement?
8 carpal bones, two rows of four form the wrist.
How many metacarpal bones are there and what do they form?
How many metacarpal bones are there and what do they form?
There are 5 metacarpal bones that join the wrist bones.
How many phalanxes are there in total?
How many phalanxes are there in total?
14 phalanxes.
How many bones are in the wrist and hand joint including the radius and ulna?
How many bones are in the wrist and hand joint including the radius and ulna?
Which digit has a sesamoid bone in its flexor tendon?
Which digit has a sesamoid bone in its flexor tendon?
Can other sesamoids occur in joints of fingers?
Can other sesamoids occur in joints of fingers?
What are the functions of the wrist?
What are the functions of the wrist?
How many carpal bones are there and what are their names?
How many carpal bones are there and what are their names?
The wrist joint is classified as a diarthrodial, which means?
The wrist joint is classified as a diarthrodial, which means?
What type of diarthrodial is the wrist joint classified as?
What type of diarthrodial is the wrist joint classified as?
How many planes does a condyloid joint permit movements in?
How many planes does a condyloid joint permit movements in?
What is another name for the wrist joint?
What is another name for the wrist joint?
What type of bone are carpal bones classified as?
What type of bone are carpal bones classified as?
Wrist movement primarily occurs between which two parts?
Wrist movement primarily occurs between which two parts?
Name the carpal bones of the proximal row from medial to lateral in the anatomical position.
Name the carpal bones of the proximal row from medial to lateral in the anatomical position.
Name the carpal bones of the distal row from medial to lateral in the anatomical position.
Name the carpal bones of the distal row from medial to lateral in the anatomical position.
What is the smallest carpal bone?
What is the smallest carpal bone?
Why is the pisiform seen easier from the palmar view than the dorsal view?
Why is the pisiform seen easier from the palmar view than the dorsal view?
What is the most commonly fractured carpal bone?
What is the most commonly fractured carpal bone?
How do scaphoid injuries occur?
How do scaphoid injuries occur?
What bones form the Sellar/Saddle joint?
What bones form the Sellar/Saddle joint?
List the carpal bones that articulate with the radius.
List the carpal bones that articulate with the radius.
How do carpal bones appear from the palmar side?
How do carpal bones appear from the palmar side?
What ligaments span the arch formed by carpal bones, and what is it called?
What ligaments span the arch formed by carpal bones, and what is it called?
What condition is characterized by decreased median nerve function due to swelling & inflammation?
What condition is characterized by decreased median nerve function due to swelling & inflammation?
Which flexor tendons do not pass through the carpal tunnel?
Which flexor tendons do not pass through the carpal tunnel?
The MCP joints of the hand are what type, structurally?
The MCP joints of the hand are what type, structurally?
Each finger has how many joints and what are they called?
Each finger has how many joints and what are they called?
What classification type are MCP joints?
What classification type are MCP joints?
What are the actions of the MCP joints?
What are the actions of the MCP joints?
The PIP and DIP joints are what specific type of diarthrodial?
The PIP and DIP joints are what specific type of diarthrodial?
What are the actions of the Interphalangeal joints?
What are the actions of the Interphalangeal joints?
What is the function of the Metacarpophalangeal joints?
What is the function of the Metacarpophalangeal joints?
What bones connect the wrist to the fingers?
What bones connect the wrist to the fingers?
How are metacarpal bones identified?
How are metacarpal bones identified?
How are the bones of the phalanges identified?
How are the bones of the phalanges identified?
How many bones do phalanges contain?
How many bones do phalanges contain?
What is the unique seller/saddle joint of the thumb called?
What is the unique seller/saddle joint of the thumb called?
Flashcards are hidden until you start studying
Study Notes
Overview of the Wrist & Hand Joints
- The wrist consists of 8 carpal bones arranged in two rows, each containing four bones.
- There are 5 metacarpal bones that connect the wrist to the fingers, numbered 1 (thumb) to 5 (little finger).
- The hand has a total of 14 phalanges, with three in each digit except for the thumb, which has two.
Total Bone Count
- Including the radius and ulna, the combined total of bones in the wrist and hand joints is 29.
Sesamoid Bones
- The thumb has a sesamoid bone located in its flexor tendon.
- Additional sesamoid bones can form in the joints of the fingers.
Wrist Functions
- The wrist aids the hand in performing fine motor activities.
Carpal Bones and Joints
- 8 carpal bones include:
- Proximal row (medial to lateral): Pisiform, Triquetrum, Lunate, Scaphoid.
- Distal row (medial to lateral): Hamate, Capitate, Trapezoid, Trapezium.
- The smallest carpal bone is the Pisiform.
- The scaphoid is most commonly fractured, often misdiagnosed as a sprain, usually due to hyperextension from falls.
- The wrist joint is a diarthrodial (freely movable) condyloid joint allowing movement in two planes.
Arch Structure and Ligaments
- The carpal bones create a three-sided arch that appears concave from the palmar side.
- This arch is supported by the transverse and volar ligaments, forming the carpal tunnel.
Carpal Tunnel Syndrome
- Carpal tunnel syndrome results from decreased median nerve function, which is affected by swelling and inflammation.
- The median nerve and the majority of flexor tendons pass through the carpal tunnel, with the exceptions being the flexor carpi ulnaris and palmaris longus.
Metacarpophalangeal (MCP) Joints
- MCP joints are classified as diarthrodial and have a condyloid structure allowing for flexion, extension, abduction, and adduction.
- Each finger includes 3 joints:
- Metacarpophalangeal (MCP) joints
- Proximal interphalangeal (PIP) joints
- Distal interphalangeal (DIP) joints
Interphalangeal Joints
- PIP and DIP joints are ginglymus (hinge joints), primarily allowing flexion and extension.
- The MCP joints support fine motor activities.
Bone Identification
- Metacarpal bones are numbered 1 to 5 starting from the thumb.
- Phalanges consist of three types: proximal, middle, and distal.
- The hand contains a total of 14 phalanges, with the thumb lacking a middle phalanx.
Unique Joint of the Thumb
- The thumb features a unique saddle joint known as the carpometacarpal (CMC) joint, which is crucial for thumb movement.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
