muscles

?
  • Created by: Sarah
  • Created on: 31-05-18 10:35
what runs through the intertubercular sulcus of the humerus?
the long head of the biceps
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what inserts onto the intertubercular suclus?
1) teres major 2) latissimus dorsi 3) pec major
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what does pec major do?
adducts + medial rotates the upper limb. Pulls scapula anteriorinferiorly
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where does pec major originate from?
sternum and clavicle
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what does pec minor do to the scapula?
pulls it against the chest wall, stabilises anterioinferiorly pulls
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where does pec minor origin and insert?
3rd-5th ribs to coracoid of scapula
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where does subclavian change to axilliary?
1st rib at armpit
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where does axillary change to brachial artery?
teres major
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what do both infraspinatus and teres minor do?
laterally rotate the arm
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what does the latissimus dorsi do?
extends adducts and medially rotates the upper limb
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what does the axillary nerve supply?
teres minor and deltoid
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what kind of joint is the glenohumeral joint?
synovial joint- ball and socket
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what does the glenohumeral joint have for shock absorption?
bursae
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wrsit joint is what kind of joint?
condyloid joint
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what is the glenohumeral joint covered with?
hyaline cartilage + glenoid labrum- fibrocartilaginous disc that prevents dislocation (creates a seal)
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what is strange about latissimus dorsi?
it extends the arm
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who are the main abductors?
0-15 suprsaprinatus 15-90 deltoid (middle fibres) over 90- trapezius and serratus anterior
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what do the rhomboids do?
rotate and retract the scapula
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where do the rhomboids originate and insert?
C7-T1 (minor) / T2-T5 spinous processes -> medial border of scapula
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what gibves adduction at the glenohumeral joint?
pec major, latissimus dorsi and teres major
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where does teres major originate and insert?
inferior angle of scapula -> intertubercular sulcus
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what are teres major and subscapularis innervated by?
subscapular nerve
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what is innervtaed by the thoracodorsal nerve?
latissimus dorsal
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what innervates trapezius
accesory nerve
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what innervates the rhomboids ?
dorsal scapular nerve
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what do each of the fibres of the deltoid do?
1) anterior- flex the arm 2) middle- major abductor 3)posterior- extend the arm
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where does the deltoid originate?
SC- scapula and clavicle
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where does the deltoid insert?
deltoid tuberosity
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teres major action?
adducts at shoulder and medially rotates the arm
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teres minor action?
laterally rotates the arm
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insertion and origin of teres minor?
posterior scapula to greater tubercule of humerus
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origins of subscapularis, infraspinaspinatus and supraspinatus?
subscapular fossa, infraspinous fossa, supraspinous fossa
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where does the subscapularis insert?
round the front- so lesser tubercule
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where does infraspinatus, teres minor and supraspinatus insert?
greater tubercule of humerus
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flexor carpi ulnaris orgin?
medial epi and ulna
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where does flexor carpi ulnaris insert?
pisiform
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where does flexor carpi radialis insert?
metacarpals 2 and 3
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where does flexor carpi radialis originate?
medial epicondyle
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action of flexor carpi radialis?
abduct and flex the wrist
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flexor carpi ulnaris innervation?
ulnar nerve
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rest of anterior compartment nerve?
median nerve (except flexor digitorum profundus + FCU)
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action of flexor carpi ulnairs?
adducts and flexes the wrist
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what muscle does not everyone have?
palmaris longus
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where does palamaris longus originate?
medial epi
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where does palmaris longus insert?
flexor retinaculum
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what does palmaris longus do?
flexion at the wrist
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pronator teres origin and insertion?
medial epicondyle -> mid shaft radius
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what part of the arm does pronator teres pronate?
the forearm
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where does the supinator come from?
lateral epi and ulna
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where does supinator go to?
radius
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what can flexor digitorum superficialis do?
flex wrist, MCP and proximal IP joints
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where does flexor digitorum superficialis insert?
middle phalnges of the fingers
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where does flexor digitorum profundus insert?
distal phalnges of the fingers
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where does flexor digitorum superficialis originate?
med epi and radius
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where does flexor digitorum profundus orginate?
ulna
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what does the flexor digitorum profundus do?
flexes wrist, MCP, proximal and distal IP
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innervation of flexor digitorum profundus?
medial 2 fingers (little and ring)- ulnar lateral- median nerve
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what side is the flexor pollicus longus on?
the thumb side
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origin and insertion of pronator quadratus?
ulna (FDP)-> radius
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what does pronator quadratus do?
pronates the forearm
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what is the deep muslce in the anterior forearm compartment associated with the thumb?
flexor pollicus longus
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where does the flexor pollicus longus originate?
ulna
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where does the flexor pollicus longus insert?
distal phalnx of the thumb
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what joints can the flexor pollicus longus flex?
MCP + IP joints of the thumb
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where do most muscles in the deep muslce in the anterior forearm compartment originate? exception?
FDP + pronator quadratus are from ulna. FDS + flexor pollicus longus is from radius.
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where does the long and short head of biceps come from?
long head- supraglenoid tubercule short- coracoid process
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what does the biceps do?
supinates the forearm and flexes at the elbow and arm
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where does biceps insert into?
Radial tuberosity
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where does coracobrachialis insert?
humerus at level of deltoid tubercle
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where does brachialis insert?
ulna tuberosity
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where does brachialis originate?
medial and lateral shaft of humerus
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where does coracobrachilalis originate?
coracoid process (-> humerus level of delotid tubercule)
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what does coracobrachilis do?
adduct and flexes at the shoulder
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what does brachialis do?
flexes at the elbow
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what are all the anterior forearm compartment supplied by?
musculocutaneous nerve
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what are all the posterior compartment supplied by?
radial nerve
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where does the long head of the triceps come from?
infraglenoid tubercule (lesser of biceps)
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where does the lateral head of the triceps come from?
humerus superior to radial groove
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where does the medial head of the triceps come from?
humerus- inferior to radial groove
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where does triceps insert?
olecranon of ulna
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what does triceps do/
extension of arm at elbow
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how is brachioradialis a flexor muslce?
flexes at elbow
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how is brachioradialis posterior compartment?
has origin from the lateral epicondyle = supplied by the radial nerve
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where does brachioradialis orginate?
lateral supracondylar ridge of humerus
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where does brachioradialis insert?
distal radius just before the styloid process (its in the name)
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where does extensor carpi longus originate?
supracondylar ridge
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where does extensor carpi brevis orginate?
lateral epi
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what makes up the medial border of the cubital fossa?
lateral border of pronator teres
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what makes up the lateral border of the cubital fossa?
medial border of brachioradialis
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what makes up the roof of the cubital fossa?
bicipital aponeurosis
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what is in the cubital fossa?
radial nerve, biceps tendon, brachial artery, median nerve
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superior border of cubital fossa?
imaginary line between epicondyles
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where do extensor carpi radialis longus and brevis insert (and also flexor carpi radialis)?
metacarpals 2 + 3
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what action do extensor carpi radialis longus and brevis perform?
extend and abduct wrist
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extensor digitorum origin and insertion?
lateral epi -> extensor hood of the fingers
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where does extensor digitorum extend?
MCP and IP joints of medial 4 fingers
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where does extensor digiti minimi originate and insert?
lateral epi -> extensor hood of little finger (along with extensor digitorum)
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action of extensor digiti minimi?
extends little finger and wrist
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aconeus origin and insertion?
lateral epi -> olecranon
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what does the aconeus do?
stabilises elbow joint
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where does extensor carpi ulnaris originate and attach?
lateral epi to metacarpal 5
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action of extensor carpi ulnaris?
adduction and extension of the wrist
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name he deep muscles of the posterior compartment?
supinator, extensor carpi radialis longus and brevis, abductor pollicus longus and extensor indicius
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where does supinator originate?
ulna and lateral epi
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where does supinator insert?
into radius
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abductor pollicus longus does what?
abducts the thumb
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where does abductor pollicus longus come from?
radius and ulna
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where does abductor pollicus longus insert?
metacarpal 1
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difference between insertions of extensor pollicus longus and brevis?
longus- distal phalnx of thumb, brevis- proximal phalnx of thumb
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what metacarpal is the thumb?
1
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what does the abductor pollicus longus do?
abduct thumb
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where does abductor pollicus longus originate and insert?
radius and ulna -> metacarpal 1
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how many palmar interressoui are there?
3
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how many dorsal interessoui?
4
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what is non communicating hydrocephalus?
a block in CSF pathway
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what is communciating hydrocephalus?
reabsorption
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where do the intereoussi originate and insetr?
lateral and medial surface of metacarpal insert into extensor hoodq
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what are interesoussi innervated by?
ulnar
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where does palmaris brevis orginate and insertion?
palmar aponeurosis + FR -> dermis of skin
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action of palmar brevis?
wrinkles skin at little finger allows better grip
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adductor pollicis originate and insertion?
metacarpal 3 + capitate -> proximal phalnx of thumb
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where does extensor pollicus brevis originate and insert?
radius -> proximal phalnx of the thumb
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what does extensor pollicus brevis extend?
MCP + CM joins of thumb
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where does extensor pollicus longus originate and insert?
ulna -> distal phalnx of the thumb
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what does the extensor pollicus longus do?
extends MCP, CM and IP joints of the thumb
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how afre extensor pollicus longus and extensor indicis similar?
both come from ulna but extensor indicius comes from further down/distal
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where does the extesnor indicis originate?
ulna
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where does extensor indicis insert?
extensor hood of index finger
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Other cards in this set

Card 2

Front

what inserts onto the intertubercular suclus?

Back

1) teres major 2) latissimus dorsi 3) pec major

Card 3

Front

what does pec major do?

Back

Preview of the front of card 3

Card 4

Front

where does pec major originate from?

Back

Preview of the front of card 4

Card 5

Front

what does pec minor do to the scapula?

Back

Preview of the front of card 5
View more cards

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