Forearm I Flashcards
The bones of the digits are call what>
Phalanges
Which finger has only a Proximal and a distal bone, no middle bone?
Thumb
The bones of the palm are called?
Metacarpals
The head of the bones are?
Distal
The bones of the wrist are called?
carpals
Which bone articulates with metacarpal 1?
trapezium
Which bone articulates with metacarpal 2?
Trapezoid
Which bone articulates with metacarpal 3?
Capitate
Which bone articulates with metacarpal 4 and 5?
Hamate
Which bones articulate with radius and ulna, respectively
Radius
Scaphoid - lunate
Ulna
Triquetrum
More anterior than all other carpal bone
Pisiform
Tendon ossification
Wrist joint
Between the forearm and the carpal bones
mainly the radius. Does not really touch the ulna
Midcarpal joint
between the caprals
Movements of the wrist joint
Flexion (more movement occurs at the midcarpal joint than at the wrist)
Extension (more movement occurs at the midcarpal joint)
Abduction (midcarpal joint provides all the carpal movement
Adduction (the wrist joint provides almost all the carpal movements)
The head of the 2-5th metacarpals form what?
knuckles
In anatomical position the fingers are in what position
adduction
T/F
Carpalmetacapal joints are very mobile in digit 2-4
False
The thumb and the pinky
what allows opposition of the thumb
the carpalmetacarpal joint
What makes the carpometacarpal joint of the arm different?
Its a synpvoial joint in which trapezium articulates with the base of the first metacarpal
Thumb does medial in anatomical position
Flexion
Thumb goes lateral in anatomical position
Extension
Anterior movement of the thumb
Abduction
Posterior movement of the thumb
Adduction
When you do opposition of the thumb what type of movement are you doing?
Abduction and Flexion using the carpal metacarpal joint
Abduction and adduction of the digits uses which joints?
metacarpalphalangeal joints
Interphalangeal joints allows you to do what?
Flex and extension
Anterior nerves of the forearm
Musculocutaneous n. (skin)
Median n. (muscles) - main one
Ulnar n. (muscles)
Muscles of the anterior forearm superficial (lateral to medial)
Origin: medial epicondyle
Innervation: median nerve except last one is ulnar nerve
Pronator Teres Flexor Carpi radialis Palmaris longus Flexor digitorum superficialis Flexor carpii ulnari
Muscles of the anterior forearm deep (lateral to medial)
Flexor pollicis longus
Flexor digitorum profundas
Pronator teres
Pronates forearm
flexion
Flexor carpii radialis
Flexion of the hand
Abduction of hand
Palmaris longus
To palmar aponeurosis
Weak flexion of forearm and hand
Flexor digitorum superficialis
Flexing of digits
Go to middle phalanges of the digits (flex proximal interphalangeal joint)
Flexion of the forearm
Flexor Carpii Ulnaris
Flexor of the hand
Adduction of hand
Flexor pollicis longus
Goes to distal phalanx of the thumb (in humans)
flexion
Flexor digitorum profundas
digit 2-5 Goes to distal phalynx Flexion Median n. 2/3 Ulnar n. 4/5 Affects distal phalanges
Pronator
Pronate forearm
Median nerve
Muscles of the posterior forearm superficial (lateral to medial)
Come from lateral epicondyle
Innervation: radial nerve
Brachoradialis
Extensor Carpi Radialis longus
Extensor carpii radialis brevis
Extensor digitorium
Brachoradialis
comes from shaft of humerus to radial bone
Flexion the forearm
Extensor Carpi Radialis longus
Insertion: metacarpal 2
Abduction
Extensor carpii radialis brevis
Insertion: metacarpal 3
Abduction
Extensor digitorium
extend proximal and middle phalanges of the digits
Extensor carpi ulnari
Extension of the forearm
Adduction
Aconuerus
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