Knee joint
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The knee joint receives its arterial blood supply from anastomoses around the knee. It has four main nerve supplies: the femoral, obturator, tibial, and common peroneal nerves. There are four main movements of the knee joint: flexion by the hamstring and gastrocnemius muscles, extension by the quadriceps femoris muscle, locking by the biceps femoris muscle which medially rotates the femur on the tibia, and unlocking by the popliteus and sartorius muscles which laterally rotate the femur on the tibia when standing or medially rotate the tibia when supine or sitting.
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Knee joint
The knee joint receives its arterial blood supply from five main arteries that anastomose around the knee, including the descending genicular artery. It is innervated by the femoral, obturator, tibial, and common peroneal nerves. There are four main movements of the knee joint: 1) flexion is achieved by the hamstring muscles and others, 2) extension is performed by the quadriceps femoris and tensor fascia latae, 3) locking occurs through medial or lateral rotation of the femur and is carried out by the biceps femoris, 4) unlocking happens through opposite rotation of the femur or tibia and involves the popliteus and other muscles.
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www.facebook.com/drraiammar
www.twitter.com/drraiammar
www.instagram.com/drraiammar
www.linkedin.com/in/drraiammar
www.themedicall.com/blog/auther/drraiammar/
For Any Book or Notes Visit Our Website:
www.allmedicaldata.wordpress.com
www.drraiammar.blogspot.com
YOUTUBE CHANNEL :
https://www.youtube.com/channel/UCu-oR9V3OdFNTJW5yqXWXxA
ANY QUESTION ??
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A teaching resource I created for an assessment for university. It lists all the main movements of the lower limb (hip joint, leg/knee and leg/foot), the muscles associated with each movement and any other relevant information. At the end is a table summarizing all the information in depth, including origin and insertion. Included within the presentation are pictures of every movement and muscle involved, as well as links to useful resources such as a 3D anatomy model.
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by DR RAI M. AMMAR
www.facebook.com/drraiammar
www.twitter.com/drraiammar
www.instagram.com/drraiammar
www.linkedin.com/in/drraiammar
www.themedicall.com/blog/auther/drraiammar/
For Any Book or Notes Visit Our Website:
www.allmedicaldata.wordpress.com
www.drraiammar.blogspot.com
YOUTUBE CHANNEL :
https://www.youtube.com/channel/UCu-oR9V3OdFNTJW5yqXWXxA
ANY QUESTION ??
Get in touch with us at Any of the Above Social Media or Email at
drraiammar@gmail.com
allmedicaldata@gmail.com
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1. Birds have specialized leg muscles called perching muscles that allow them to tightly grip branches.
2. There are two sets of perching muscles - flexor muscles and extensor muscles. The flexor muscles bend the toes to grip the branch, while the extensor muscles straighten the toes to release from the branch.
3. When a bird lands on a branch, the flexor tendons are stretched and pull the toes into a flexed position to grip the branch tightly. Its weight further increases the grip. The bird uses its extensor muscles to raise its body weight and straighten its legs to unlock its feet from the perch.
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- Descriptors of muscle shapes, locations, directions, and other features
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Mediating Roles of Self-Image Expression: Sharing Travel Information of SNSs
Knee joint
- 1. Arterial supplyofknee joint: from anastomosisaroundknee Nerve supplyof the knee: 1.femoral 2.obturator 3.tibial 4.common pernoeal
- 2. Movements ofthe knee joint: 1- Flexion:By the Hamstringmuscles+ gracilis,gastrocnemius,sartorius, popliteus,plantaris 2- Extension:By the Quadricepsfemoris+ tensor fascialatae. 3- Locking ofthe knee joint= medial rotationof the femur on the tibia infull extension(or lateral rotationof the tibia) . It occurs by Biceps femoris. 4- Unlockingof the Knee: In standing(tibiafixed) = lateral rotationof femur on tibia,Insupine or sitting(tibiafree) = Medial rotation oftibia.By popliteus+ sartorius,gracilis,semitendinosusand semimembrenosus.