Exam 3 Flashcards
Biceps Brachii Muscle
O: Coracoid process and supraglenoid tubercle
I: Radial Tuberosity
A: Flexion and supination
Brachialis Muscle
O: Anterior Humerus
I: Coronoid process of the ulna
A: Flexion
Brachioradialis Muscle
O: Lateral Humerus
I: Styloid process of the radius
A: Flexion, pronation, and supination
Triceps Brachii Muscle
O: Infraglenoid tubercle and posterior humerus
I: Olecranon process
A: Elbow Extension
Pronator Teres Muscle
O: Medial Humerus and Ulna
I: Lateral Radius
A: Pronation
Pronator Quadratus Muscle
O: Anterior Ulna
I: Anterior Radius
A: pronation
Supinator Muscle
O: Ulna
I: Lateral Radius
A: Supination
What kind of joint is the elbow?
ginglymus
What are the 2 elbow joints?
- Humeroulnar Joint (distal humerus and proximal ulna)
- Radiohumeral Joint (distal humerus and proximal radius)
As the elbow flexes 20 degrees or more, what happens?
its bony stability is unlocked allowing for more side-to-side laxity
T/F: Collateral ligaments prevent/reduce frontal plane motion
True
Elbow flexion
145 degrees
Elbow extension
0 degrees
Elbow hyper extends how many degrees?
10 degrees
Radioulnar joint supination and pronation
70-90 degrees
Carrying angle
when a person is in anatomical position, the normal carrying angle places stress on the medial side of the elbow
Ginglymus joints
Sagittal plane; frontal axis
Flexor Carpi Radialis Muscle
O: Medial epicondyle of humerus
I: 2nd and 3rd metacarpals
A: Flexion and abduction
Flexor Carpi Ulnaris Muscle
O: Medial epicondyle
I: pisiform, hamate, and 5th metacarpal
A: Flexion and adduction
Extensor Carpi Radialis Brevis Muscle
O: Lateral Epicondyle
I: Base of 3rd metacarpal
A: Extension and abduction
Extensor Carpi Radialis Longus Muscle
O: lateral epicondyle
I: 2nd metacarpal
A: extension and abduction
Flexor digitorum superficialize muscle
O: medial Epicondyle
I: middle phalanx
A: Finger flexion
(Neutralizer keeps wrist from flexion when flexing fingers)
Flexor Digitorum profundus muscle
O: Meidal Ulna
I: Distal Phalanx
A: finger flexion
Extensor Digitorum muscle
O: lateral epicondyle
I: middle and distal phalanx
A: finger extension
Radioulanr Joint
Annular ligament helps keeps the head of the radius against the ulna (indirectly stabilizes the radiohumral joint)
What kind of joint is the Radioulnar joint?
Trochoid joint; rotation = pronation & supination
When CANT the radioulnar joint function?
When the elbow is extended; become internal and external rotation of the shoulder
What holds the interosseous membrane hold together?
the radius and ulna
Radial collateral ligament =
Lateral collateral ligament
Ulnar collateral ligament =
Medial collateral ligament
What muscle only affects the thumb
Pollicis muscle
How many bones are there in the wrist and hand
29
How many carpal bones are there
8 in 2 rows
How many phalanxes are there
14
What are the names of the phalanxes
distal, middle, and proximal
What carpal bones are in the proximal row
Scaphoid, lunate, triquetrum, pisiform
What carpal bones are in the distal row
Trapezium, trapezoid, capitate, hamate
What proximal bone has very poor blood supply?
scaphoid bone
Which proximal bone is most often dislocateed
Lunate bone
What joint is only in the thumb and is a seller joint
carpometacarpal joint and there’s only 2 in the body
What is NOT located in the anatomical snuff box
seller joint
What bones help form an important arch in the wrist?
The distal bones; T.T.C.H
Where is the wrist joint in between?
the distal radius & ulna AND the proximal row of carpals
Wrist flexion and extension
65-90 degrees
Wrist adduction
25-40 degrees
wrist abduction
15-25 degrees
What are the names of the three finger joints
- Metacarpophalangeal joints
- Proximal interphalangeal joints
- Distal Interphalangeal joints
What type of joint are interphalangel joints
ginglymus joints which have carpometacarpal joints on both sides
Most of the wrist flexors are held together by…
Retinaculum
Thick pad of muscles under the thumb are called what
Thenar muscles; most are only pollicis muscles- thumb specific
Muscles on the opposite side of the Thenar muscles are called what
Hypothenar muscles
Where is the triangular fibrocartilage located
medial side of the ulna
what does fibrocartilage do?
shock absorption and stability
What is opposition?
movement of the thumb towards the other 4 digits
What joint makes opposition possible
the sellar joint
Where does the carpal tunnel meet
at the wrist flexors and median nerve
Extensor Carpi Ulnaris Muscle
O: lateral epicondyle
I: base of 5th metacarpal
A: Extension & adduction
