Intro to the Hand ppt 1

Lakukan tugas rumah & ujian kamu dengan baik sekarang menggunakan Quizwiz!

How many IP joints does the thumb have?

1

How many thumb flexor extrinisc muscles are there?

1

How many DOF does the IP joint have? What motions does it perform?

1 DOF- flexion and extension

The 1st MCP joint of the thumb has how many DOF? What motions are performed?

1 DOF- performs flexion/ extension

How are the IP joints broken up/ into section?

1 IP in thumb 4 PIP joint in digits 2-5 4 DIP joints in digits 2-5

How many phalangeal bones are in a hand?

14 total

The hand is made up of ___ bones, ___ joints, multiple ligaments, and _____ different muscle groups

19, 19, and 7

What is the stable link in the thumb chain>

1st MCP joint because of the high mobility of the 1st CMC joint

How many finger flexor extrinsic muscles are there?

2

Extrinsic thumb tendons have ____ extensors, ___ abductor, and ____ flexor

2, 1, 1

How many IP joints do digits 2-5 have?

2- Proximal and Distal (PIP&DIP)

How many bones are found in the wrist and hand?

29 bones

How many extrinsic thumb muscles do we have?

3

How many finger extensor extrinsic muscles are there?

3

How many thumb extensor/abductor extrinsic muscles are there?

3

How many DOF does the thumb CMC joint have? To perform what motions?

3 DOFs to perform flexion, extension, abduction, adduction, opposition, reoposition

How many middle phalanges are in a hand?

4

How many CMC joints in the hand are there?

5

How many MCP joints in the hand are there?

5

How many distal phalanges are there in a hand?

5

How many metacarpal bones are in a hand?

5

How many proximal phalanges are in a hand?

5

How many collateral ligaments does each finger have?

6

Within the long finger flexors, there are 2 muscle bellies that control ____ long tendons that cause flexion of ____ and ____ joints of digits 2-5

8, DIP and PIP joints

How many IP joints in the hand are there?

9

How many muscles act on the thumb?

9

What extrinsic muscle abducts and extends the 1st CMC joint and assists with wrist extension or radial or deviation?

APL

What extrinsic muscle extends the CMC joint of the thumb?

APL and EPB and EPL

Volar plates help stabilize joints against ______________ and increase the range of motion for ________

Against hyperextension; Increase range of flexion

What type of joint is the CMC? with what type of capsule?

Basal/ Saddle joint; it has a thick, loose packed capsule

Where is the IP joint found?

Between the thumb's distal and proximal phalanx.

What does CMC stand for?

Carpometacarpal joint

At the MCP joints, are metacarpals convex or concave? What does this mean?

Convex- thus the metacarpals turn within the concave phalanges at the MCP joint

The FDP has 4 different tendons of the ____ in each digit

DIP

What is another name for the posterior extrinsic muscles? What are they all?

Digit Extensors; (6): EDC, EI, EDM, EPL, EPB, and APL

What is another name for anterior extrinisc muscles? What are they all?

Digit Flexors; (3) FDS, FDP, and FPL

Where is the distal end of the bone of the distal phalanx found?

Directly under the fingernail

What does DIP stand for?

Distal Interphalangeal Joint

Put the Phalanges/Joints in order from distal (found under finger nail) to the wrist (proximal) PIP joint, CMC joint, MCP joint, DIP joint, IP joint, Carpals, Distal phalanx, middle phalanx, metacarpal, proximal phalanx

Distal Phalanx DIP Joint Middle Phalanx (not on thumb) PIP Joint Proximal Phalanx IP Joint- (just at thumb) MCP Joint Metacarpal CMC Joint Carpals

What extrinsic muscles assist with wrist extension?

EDC, EDP, APL, EPB, and EPL

What are the names of EDC, EI, EDM, EPL, EPB, and APL? What do they stand for?

EDC= Extensor digitorium communis EI= Extensor indicis EDM= Extensor digitorium minimi EPL= Extensor pollicis longus EPB= Extensor pollicis brevis APL= Abductor pollicis longus

What extrinsic muscle extends the MCP, PIP, and DIP of the 5th digit only?

EDM

What extrinsic muscle extends the 2nd digit MCP, PIP, and DIP?

EIP

What muscle extends the CMC AND MCP joints of the thumb and assists with wrist extension?

EPB

What muscle extends the thumb CMC MCP and IP?

EPL

_____, _____, and ___ are in the extensor compartments of long thumb tendons and have synovial sheaths

EPL, EPB, and APL

What makes up the anatomical snuff box?

EPL, EPB, and APL tendons- form a triangle on the radial side of the hand

We can only full abduct/ adduct the MCP joints when fingers are __________

Extended

What extrinsic muscle extends the MCP, PIP, DIP of digits 2, 3, 4, and 5?

Extensor digitorium communis (EDC)

What extrinsic muscles is a 4 joint muscle that performs DIP joint flexion of digits 2, ,3,4, and 5?

FDP

What muscle assists with PIP, MCP, and wrist flexion?

FDP

What extrinsic muscle(s) has 4 different tendons of the PIP in each of the digits 2,3,4, and 5?

FDS

What extrinsic muscle(s) performs PIP flexion of digits 2-5?

FDS

What extrinsic muscle(s) assist with wrist flexion?

FDS, FDP, and FPL

What extrinsic muscle(s) perform MCP flexion?

FDS, FDP, and FPL

What extrinsic muscle (s) performs thumb IP, MCP, and CMC flexion?

FPL

What are the names of FDS, FDP, FPL? (What do they stand for?

Flexor digitorium superficialis, Flexor digitoirum profundus, Flexor pollicis longus

What type of joint is the IP joint?

Hinge

What do ligaments do?

Hold joints together that have to be loose- they can get damaged

Where is the 1st CMC joint?

In the thumb

Each tendon to individual digits can work _______ of the other tendons from the same muscle

Independently

What does IP stand for?

Interphalangeal joint

What is found surround each joint of the MCP, PIP, and DIPs?

Joint capsules

What does palmar aponeurosis/fascia cover and protect?

Long finger flexor tendons

The medial and lateral collateral ligaments are both taut when __________

MCP or IP are in flexion

What are the ligaments of the digits?

Medial collateral ligament Lateral collateral ligament Transvere metacarpal ligament

What makes a 'Ray'?

Metacarpal+ phalangeals of each digit (So there is a ray for each digit)

Where do the intrinsic muscles originate from?

Metacarpals

What does MCP stand for?

Metacarpophalangeal joint

What does extrininsic mean?

Outside

The FDS has 4 different tendons of the ___ in each digit (one per digit)

PIP

What is the thick, connective tissue that spans from the flexor retinaculum up through the palm?

Palmar aponeurosis

What is another name for palmar aponeurosis?

Palmar fascia

What does PIP stand for?

Proximal Interphalangeal joint

What nerve has a sensory branch in the middle of the snuff box?

Radial nerve

What bones are found at the floor of the snuff box?

Scaphoid and trapezium

In the palm, flexor tendons are covered by a tendon sheath that holds synovial fluid to promote _______

Smooth gliding action

What digit does not have a middle phalange?

Thumb

What digit is #1?

Thumb (I)

What is the most functional and highly used joint of the hand?

Thumb CMC joint

True or False: All IP joints have volar plate systems

True

True/ False- All MCP joints have a volar plate

True

Are IP joints stable or mobile?

Very stable- but small and easily damaged

What are fibrocartilaginous discs that are found on the anterior surface of MCPs, PIPs, and DIPs that stabilize structures of the hand?

Volar plates

When are the medial and lateral ligaments loose?

When digits are in extension

Thumb muscle origins are ______ to finger and wrist muscles

distal

Volar plates slide proximally under ___________ during flexion

metacarpals

FPL is included in the ______ synovial sheath system

palmar

The extensor _______ divides the thumb and finger extensor tendons into 6 different compartments that have ___-____ tendons with independent sheaths

retinaculum; 1-4

The long finger flexors work _______ for composite finger flexors- they can work independently but have significantly less power when they do so

synergistically


Set pelajaran terkait

Social Psychology by David Myers - Chapter 5

View Set

Chapter Exam - Life Underwriting

View Set

Essentials of Anatomy & Physiology, Chapter 6, Skeletal System

View Set