Muscles Of Upper Limb 3 Flashcards
The muscles in the anterior compartment of the forearm are organised into three layers
——- of _ muscles
——— of _ muscles
———of _ muscles
4 superficial
- 1 intermediate
- 3 deep
The anterior forearm muscle group is associated with ____ action of the forearm, ____ of the wrist and _____ of the fingers.
pronation
flexion
flexion
The anterior forearm muscle group are mostly innervated by the _____ nerve , and they recieve arterial supply from the ____ artery and ____ artery
median
ulnar
Radial
Time to list the muscle of anterior forearm
Superficial:
_____, _____, _____, _____
Intermediate: ________
Deep: ______ ,______, and_____
flexor carpi ulnaris
flexor carpi radialis
palmaris longus
pronator teres.
flexor digitorum superficialis.
flexor pollicis longus; flexor digitorum profundus; pronator quadratus.
The superficial muscles in the anterior compartment all originate from a common tendon, which arises from the ______ of the ____
medial epicondyle
humerus.
FLEXOR CARPI ULNARIS
ORIGIN: ______ and ____
INSERTION: ______ bone
ACTION: (flexion or extension?) and (adduction or abduction ?) at ____
INNERVATION: ____ nerve
medial epicondyle
ulna
pisiform carpal
flexion
adduction
wrist
ulnar
FLEXOR CARPI RADIALIS
ORIGIN: ______
INSERTION: ____ of ____ — and —
ACTION: (flexion or extension?) and (adduction or abduction?) at the wrist
INNERVATION : ____ nerve
medial epicondyle
base; metacarpals; 2 and 3
flexion
abduction
median
PALMARIS LONGUS
-absent in about __% of the population
ORIGIN: _____
INSERTION: _____
ACTION: (flexion or extension ?) at the wrist
INNERVATION : _____ nerve
15
medial epicondyle
flexor retinaculum
flexion
median
PRONATOR TERES
ORIGIN:
_______
_____ of ulna
INSERTION: _____ of ____
ACTION: ____ of the forearm
INNERVATION : ____ nerve
medial epicondyle
coronoid process
lateral mid shaft; radius
pronation
median
FLEXOR DIGITORUM SUPERFICIALIS
ORIGIN:
____
____
INSERTION: _____ phalanx of the four digits
ACTION: (flexion or extension?) of fingers (at MP and proximal IP joints)and wrist
INNERVATION : ______ nerve
medial epicondyle
Radius
middle
Flexion
median
FLXEOR DIGITORUM PROFUNDUS
ORIGIN:
_____
_____
INSERTION: ____ phalanx of the four digits
ACTION: (flexes or extends?) ____ IP joints and the wrist
INNERVATION :medial half is by ___ nerve; lateral half is by ______ nerve
ulna
interosseous membrane
distal
flexes; distal
ulnar
median
FLEXOR POLICIS LONGUS
ORIGIN: _____ and ______
INSERTION: ____ phalanx of ______
ACTION: (flexes or extends?) IP and MP joint of thumb
INNERVATION : ____ nerve
radius
interosseous membrane
distal; thumb
flexes
median
PRONATOR QUADRATUS
ORIGIN:
_____ surface of ___
INSERTION:
_____ surface of _____
ACTION: _____ of forearm
INNERVATION : _____ nerve
anterior
ulna
anterior; radius
pronation
median
The muscles in the posterior compartment of the forearm are commonly known as the ____ muscles.
The general function of these muscles is to produce _____ at the ____ and ___.
They are all innervated by the _____ nerve.
extensor
extension
wrist and fingers
radial
The superficial layer of the posterior forearm contains ___ muscles. Four of these muscles – extensor _____, extensor ____, extensor ____ and extensor _____ share a common tendinous origin at the ____
seven
carpi radialis brevis
digitorum
carpi ulnaris
digiti minimi
lateral epicondyle
EXTENSOR CARPI ULNARIS
ORIGIN: ______
INSERTION : ____ of _____
ACTION : (flexion or extension?) and (adduction or abduction?) at wrist
INNERVATION : _____ nerve(deep branch)
lateral epicondyle
base; metcarpal 5
extension
adduction
radial
EXTENSOR CARPI RADIALIS LONGUS AND BREVIS
ORIGIN:
ECRL- _______
ECRB- _______
INSERTION : ______ — and —
ACTION : (flexes or extends?) and (adducts or abducts?) at the wrist
INNERVATION: ____ nerve
supracondylar ridge
lateral epicondyle
metacarpals 2 and 3
extends
abducts
EXTENSOR DIGITORUM
ORIGIN: _______
INSERTION: ______ of the four digits
ACTION : (flexes or extends?) at MP and IP joints
INNERVATION: ____ nerve( deep branch)
lateral epicondyle
extensor hood
extends
radial
EXTENSOR DIGITI MINIMI
ORIGIN: _____
INSERTION : ______ of pinky
ACTION : (flexes or extends?) pinky
INNERVATION: ______ nerve( deep branch
lateral epicondyle
extensor hood
extends
radial
BRACHIORADIALIS
ORIGIN: ____ aspect of ____
INSERTION :____ end of ____, just before it’s _____
ACTION : (flexes or extends ?) at the elbow
INNERVATION: ___ nerve
proximal
lateral supracondylar ridge
distal
radius
styloid process
flexes
radial
ANCONEUS
-blends with the fiber of _____
ORIGIN: _____
INSERTION : _____ part of _____
ACTION :
(flexes or extends?) and stabilizes ____ joint
(Adducts or abducts?) the ulna during _____ of forearm
INNERVATION; ___ nerve
triceps brachii
lateral epicondyle
posterolateral; olecranon
extends; elbow
abducts
pronation
radial
Lateral Epicondylitis
Lateral epicondylitis (or _____) refers to inflammation of the ___ of the lateral epicondyle. The peak age of onset is __ to ___ years old.
It is caused by repeated use of the _____ muscles, which strains their common tendinous attachment to the lateral epicondyle.
tennis elbow
periosteum
40-50
superficial extensor
There are ___ muscles in the deep compartment of the posterior forearm
five
List the muscles in the deep posterior compartment of the forearm
the supinator, abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus and extensor indicis.
The supinator lies in the __ of the cubital fossa.
It has two heads, which the ___ branch of the ____ nerve passes between.
floor
deep
radial
SUPINATOR
-__ heads
ORIGIN:
_____
___ surface of ___
INSERTION : ___ surface of ___
ACTION : ____ the forearm
INNERVATION : ___ nerve ( deep branch)
2
lateral epicondyle
post; ulna
post; radius
supinates
radial
ABDUCTOR POLLICIS LONGUS
ORIGIN: _____ surface and interosseous membrane of ___ and ___
INSERTION : (medial or lateral?) (apex or base ?) of ____
ACTION : ____ the thumb
INNERVATION : ____ nerve (—B)
posterior; ulna and radius
Lateral
Base
metacarpal 1
abducts
radial; PI
EXTENSOR POLLICIS LONGUS
ORIGIN: ____ surface and interosseous membrane of ____
INSERTION : —— phalanx of the thumb
ACTION : CP, metarcarpoohalngeal, and IP joints
INNERVATION : ___ nerve(PIB)
posterior
ulna
distal
radial
EXTENSOR POLLICIS BREVIS
ORIGIN: _____ surface and interosseous membrane of ___
INSERTION : ____ phalanx of the thumb
ACTION : MP and carpometcarpal joints
INNERVATION : ____ nerve (PIB)
posterior
radius
proximal
radial
EXTENSOR INDICIS
ORIGIN: ____ surface and interosseous membrane of ____, (proximal or distal?) to extensor policis longus
INSERTION : _____ of index finger
ACTION : (flexes or extends?) the index finger
INNERVATION : ___ nerve (PIB)
posterior
ulna
distal
extensor hood
extends
radial
Wrist drop is a sign of ___ nerve injury that has occurred ___ to the elbow.
radial
proximal
There are two common characteristic sites of damage of radial nerve :
Axilla – injured via _______s or fractures of the ____
Radial groove of the humerus – injured via a _____
humeral dislocation
proximal humerus.
humeral shaft fracture.
The radial nerve innervates all muscles in the extensor compartment of the forearm.
T/F
T
In the event of a radial nerve lesion, these muscles are ____. The muscles that flex the wrist are innervated by the ____ nerve, and thus are unaffected. The tone of the flexor muscles produces unopposed flexion at the wrist joint – wrist drop.
paralysed
median
