Elbow Movement and Muscles

so um because all muscles around the elbow joint will contribute to Elbow movement so um I'm I'm just going to talk about the primary um muscle that um evolve in elbow movement um okay so uh the first primary elbow VOR uh I want to talk about is brachialis um brachialis is a strong elbow flexor no matter um this uh the the elbow is um Contracting against uh external load or uh internal load or is it a fast movement or slow movement okay so it's a it's a it's a great uh elbow flexor um the uh the brachialis is strongest when the elbow is in flexions of 100° it it kind of help um in pronation and superation but as you can see that it's really um um to the tip of um the bone right here it it the the momentum is really really short so um it's function in um assisting prion and superation is really really weak so that's why uh when we uh think of uh the the role of uh brachialis we typically see uh this muscle is as a strong elbow flexor okay now the famous one is the biceps Breaky eye um if you uh look uh at the uh the biceps muscles you see that the biceps kind of uh it's a multi-joint muscle it kind of cross the elbow um the forearm and the shoulder okay um the bicep break ey is most uh efficient when the uh the elbow is in uh 90° of flexion and when the form is in superation okay and research shows that when uh the forearm is in pronation um it's nearly inactive um so you can kind of see that if you want to block the function of uh biceps you you can put the for in pronation and act ask this person to bend the elbow then you're not uh activating or initiating um the biceps another prime mover for elbow flection is brachio radiatus you see that uh it's the origin is really close to the end of the humoral bone but you kind of go all the way down on the radial bone right here and it's kind of uh um kind of kind of very close to the radial bone so you can kind of see that by Nature if you look at the muscle right here it it can of help in AOW faction of course and it it kind of has a role for form poration and subnation however um um its role uh in pration superation is it's only like up to the to the mid position so if your forarm is in supination uh break your radial is going to help uh to pronate to uh to Mid position if your form is in pration uh the break your radiatus is is only helpful to bring um the for the forarm uh um I'm sorry to supernat forearm up to the mid position okay um so when we think about the elbow faction um if you if you look at it the muscle this way now it's not surprising to see that um the most um effective position for this uh breu radialis function is when the form is in neutral position okay um and these are the secondary elbow flexors um so I'm not going to spend time talk about it because you can kind of see that uh the the major the primary movement for these musle are uh wrist or uh yeah uh these are the wrist so I'm not going to talk about it um here uh what about the primary extensor uh for the elbow um the famous is triceps Breaky eye um tricep Breaky eye has uh three heads the long head um I'm sorry the long head and the lateral head and when you take this two heads out uh you see the medial head um um right there and all heads are active in resistive uh concentric or Ecentric uh movement um the long head however uh it's not so efficient when the elbow is in extension combined with um shoulder in uh extension the medi head is much stronger when uh this person is moving uh I'm sorry the moving the elbow in into um extension without um resistance okay another primary elbow extensor is an anonas you see this muscle is really tiny right here so uh but it's really important because um this muscle is active when we initiating and maintain the elbow in extension so you see that um the um the size is small but if you see from this direction it's kind of huge so it's it's its main role is really to help to stabil The Joint okay it does not allow too much movement because the movement came from um sorry come from the tricep um muscles um but the anchoress is really uh to stabilize The Joint okay so um so these are the elbow flections and extensions um so when we look at the the arrange of motion at the elbow uh um we can see that the research shows that uh flaxer is stronger than extensor um and in the in the clinical practice you will see this wnl or wfl W NL stands as within normal limits which is the norm um depending on which Norm you're using so it's like 0 to 140 or to 150° um and if you see this uh within functional limit it's with is between 30° of elow um U flection to 130° of elbow fraction and you see we typically um document the fraction extension together so zero means extension the elbow extension to zero and kind of bend the elbow all the way um to 140 or 150 so here you can can see the same thing so um starting points uh elbow um inflection uh 30° and it going to bend more to 130° okay so you may argue that what about the lacking 30° well um it's functional limit we don't need a zero to to be functional honestly and in um as a matter of fact most ADL require um an arc for the elbow movement from uh 60° to 120 Dees okay you can try that yourself try to bring your hand to your mouth or buttoning or zipping uh your clothes or wash washing your hair or uh tying your shoes you can observe your elbow um joint it doesn't require you uh a true zero or a 140 um degrees of flection or extension okay um the nend field about uh El faction should be soft I mean normally it should be soft because it's muscle to muscle and it should be hard and fuel for um shoulder um sorry uh um elbow extension because that's when the uh Elum process move into the FSA and um there is um very limited Mobility or cushion within that fora but still uh it is considered hard and field okay and if you look at the range of motion when the Forum um is in neutral and you bend the elbow that's when we we can get the uh the greatest um elbow um flexion and as see um when you um consider the biceps muscles then you know that shoulder um position has a road um to the Elbow flexion as well okay so uh when you when we measure uh range of motion of the elbow uh we typically um adduct the shoulder so that we want the best of them sorry right so uh we wna we we have the shoulder to relax in U uh close to the body and then and ask uh our client uh from from zero of extension and bend the elbow and and and then we can get a better reading of shoulder I'm sorry of elbow movement okay and one last thing I want to talk about elbow is the carrying ankle well carrying ankle um it's also called cubitus vulgus which means it going to go abduction or go laterally so it's really um the um the the trucker is longer than the uh cachula um and that just well it's just uh create that ankle and normally for men U it's 5° and women tend to have greater uh carrying angle than man and it doesn't mean it doesn't mean that um that this angle can lead to functional div it's just uh the Outlook of it that's it so this is the uh elbow complex so uh what you need to know is elbow complex is really consisted of three um joint uh humal on joint humal radial joint and proximal radial and oner joint and also the joint is surrounded by massive uh ligaments you need to know um the owner were uh the medial collateral ligaments the lateral collateral ligaments and of course one of the uh L ceral ligaments is called anular um ligaments anular ligament is important because that help to um stabilize the radio head in place to uh to spin um for the Pern superation and of course you need to know the prime mover for elbow flection and extension okay

so um because all muscles around the elbow joint will contribute to Elbow movement so um I&#39;m I&#39;m just going to talk about the primary um muscle that um evolve in elbow movement um okay so uh the first primary elbow VOR uh I want to talk about is brachialis um brachialis is a strong elbow flexor no matter um this uh the the elbow is um Contracting against uh external load or uh internal load or is it a fast movement or slow movement okay so it&#39;s a it&#39;s a it&#39;s a great uh elbow flexor um the uh the brachialis is strongest when the elbow is in flexions of 100° it it kind of help um in pronation and superation but as you can see that it&#39;s really um um to the tip of um the bone right here it it the the momentum is really really short so um it&#39;s function in um assisting prion and superation is really really weak so that&#39;s why uh when we uh think of uh the the role of uh brachialis we typically see uh this muscle is as a strong elbow flexor okay now the famous one is the biceps Breaky eye um if you uh look uh at the uh the biceps muscles you see that the biceps kind of uh it&#39;s a multi-joint muscle it kind of cross the elbow um the forearm and the shoulder okay um the bicep break ey is most uh efficient when the uh the elbow is in uh 90° of flexion and when the form is in superation okay and research shows that when uh the forearm is in pronation um it&#39;s nearly inactive um so you can kind of see that if you want to block the function of uh biceps you you can put the for in pronation and act ask this person to bend the elbow then you&#39;re not uh activating or initiating um the biceps another prime mover for elbow flection is brachio radiatus you see that uh it&#39;s the origin is really close to the end of the humoral bone but you kind of go all the way down on the radial bone right here and it&#39;s kind of uh um kind of kind of very close to the radial bone so you can kind of see that by Nature if you look at the muscle right here it it can of help in AOW faction of course and it it kind of has a role for form poration and subnation however um um its role uh in pration superation is it&#39;s only like up to the to the mid position so if your forarm is in supination uh break your radial is going to help uh to pronate to uh to Mid position if your form is in pration uh the break your radiatus is is only helpful to bring um the for the forarm uh um I&#39;m sorry to supernat forearm up to the mid position okay um so when we think about the elbow faction um if you if you look at it the muscle this way now it&#39;s not surprising to see that um the most um effective position for this uh breu radialis function is when the form is in neutral position okay um and these are the secondary elbow flexors um so I&#39;m not going to spend time talk about it because you can kind of see that uh the the major the primary movement for these musle are uh wrist or uh yeah uh these are the wrist so I&#39;m not going to talk about it um here uh what about the primary extensor uh for the elbow um the famous is triceps Breaky eye um tricep Breaky eye has uh three heads the long head um I&#39;m sorry the long head and the lateral head and when you take this two heads out uh you see the medial head um um right there and all heads are active in resistive uh concentric or Ecentric uh movement um the long head however uh it&#39;s not so efficient when the elbow is in extension combined with um shoulder in uh extension the medi head is much stronger when uh this person is moving uh I&#39;m sorry the moving the elbow in into um extension without um resistance okay another primary elbow extensor is an anonas you see this muscle is really tiny right here so uh but it&#39;s really important because um this muscle is active when we initiating and maintain the elbow in extension so you see that um the um the size is small but if you see from this direction it&#39;s kind of huge so it&#39;s it&#39;s its main role is really to help to stabil The Joint okay it does not allow too much movement because the movement came from um sorry come from the tricep um muscles um but the anchoress is really uh to stabilize The Joint okay so um so these are the elbow flections and extensions um so when we look at the the arrange of motion at the elbow uh um we can see that the research shows that uh flaxer is stronger than extensor um and in the in the clinical practice you will see this wnl or wfl W NL stands as within normal limits which is the norm um depending on which Norm you&#39;re using so it&#39;s like 0 to 140 or to 150° um and if you see this uh within functional limit it&#39;s with is between 30° of elow um U flection to 130° of elbow fraction and you see we typically um document the fraction extension together so zero means extension the elbow extension to zero and kind of bend the elbow all the way um to 140 or 150 so here you can can see the same thing so um starting points uh elbow um inflection uh 30° and it going to bend more to 130° okay so you may argue that what about the lacking 30° well um it&#39;s functional limit we don&#39;t need a zero to to be functional honestly and in um as a matter of fact most ADL require um an arc for the elbow movement from uh 60° to 120 Dees okay you can try that yourself try to bring your hand to your mouth or buttoning or zipping uh your clothes or wash washing your hair or uh tying your shoes you can observe your elbow um joint it doesn&#39;t require you uh a true zero or a 140 um degrees of flection or extension okay um the nend field about uh El faction should be soft I mean normally it should be soft because it&#39;s muscle to muscle and it should be hard and fuel for um shoulder um sorry uh um elbow extension because that&#39;s when the uh Elum process move into the FSA and um there is um very limited Mobility or cushion within that fora but still uh it is considered hard and field okay and if you look at the range of motion when the Forum um is in neutral and you bend the elbow that&#39;s when we we can get the uh the greatest um elbow um flexion and as see um when you um consider the biceps muscles then you know that shoulder um position has a road um to the Elbow flexion as well okay so uh when you when we measure uh range of motion of the elbow uh we typically um adduct the shoulder so that we want the best of them sorry right so uh we wna we we have the shoulder to relax in U uh close to the body and then and ask uh our client uh from from zero of extension and bend the elbow and and and then we can get a better reading of shoulder I&#39;m sorry of elbow movement okay and one last thing I want to talk about elbow is the carrying ankle well carrying ankle um it&#39;s also called cubitus vulgus which means it going to go abduction or go laterally so it&#39;s really um the um the the trucker is longer than the uh cachula um and that just well it&#39;s just uh create that ankle and normally for men U it&#39;s 5° and women tend to have greater uh carrying angle than man and it doesn&#39;t mean it doesn&#39;t mean that um that this angle can lead to functional div it&#39;s just uh the Outlook of it that&#39;s it so this is the uh elbow complex so uh what you need to know is elbow complex is really consisted of three um joint uh humal on joint humal radial joint and proximal radial and oner joint and also the joint is surrounded by massive uh ligaments you need to know um the owner were uh the medial collateral ligaments the lateral collateral ligaments and of course one of the uh L ceral ligaments is called anular um ligaments anular ligament is important because that help to um stabilize the radio head in place to uh to spin um for the Pern superation and of course you need to know the prime mover for elbow flection and extension okay

Transcript for:Elbow Movement and Muscles

Transcript for:
Elbow Movement and Muscles