Category anatomy

The ileopsoas muscle is often considered as a single biarticular muscle, located in the low back region and in the anterior region of the thigh. In reality it is formed by two distinct portions: the large psoas muscle, and the iliac muscle. It originates from the lateral faces of the bodies of the last thoracic vertebra, from the first four lumbar vertebrae and from the interposed disks, and from the base of the transverse processes of the first four lumbar vertebrae

The iliac muscle is a muscle located in the iliac fossa and participates in the formation of the posterior abdominal wall. It originates from the iliac fossa, from the internal labrum of the iliac crest, from the two anterior iliac spines, from the interlocking incisive between them and from the wing of the sacrum

The infraspinatus muscle takes origin from the 3/4 medialis of the infraspinata fossa, from the spine of the scapula and from the band infraspinata. Its bundles are directed obliquely upward and end in a tendon that is inserted on the middle facet of the great humeral tuberosity. With his action he externally rotates his arm and strengthens the capusla of the scapular humeral joint, stabilizing it

The breathing muscles can be classified into two main categories: on the one hand the inspiratory muscles that with their action elevate the ribs and the sternum increasing the volume of the rib cage and on the other the expiratory muscles that lower the ribs and the sternum decreasing the volume of the rib cage

A lever is a simple machine, a device built by man to win by means of a force, called a motor, another force called a resistant one. The purpose of the primordial levers was to amplify the human strength allowing to perform jobs not allowed by the simple use of the muscular force. The levers obey a fairly simple physical principle: the system is in equilibrium if the resultant of the moments of the two forces is zero

L1 L2 L3 L4 L5 S1 S2 S3 Sartorio Ileoposoas External shutter Pettineo gracile Long connector Short lead Quadriceps Great adductor Anterior Tibial Posterior tibial Lata fascia tensor Small and medium buttock Semitendinosus Semimebranoso Long toe extender Long finger extender Front peroneal (third) Peroneo breve Long peroneus gastrocnemius Soleo Plantar Hamstring Great buttock piriformis Gemini Internal shutter Femur square L1 L2 L3 L4 L5 S1 S2 S3 Upper limb Lower limb Trunk Abdomen Articles

EXTENSION large backbone interspinous intertransversarii rotator multifidus semispinali. spinal very long Erector INCLINATION external oblique internal oblique square of the loins iliopsoas large backbone intertransversarii rotator multifidus semispinali very long Erector TWIST ipsilateral internal oblique external oblique contralateral contralateral rotators contralateral multifidus contralateral seminals BENDING straight abdomen Upper limb Lower limb Trunk Abdomen Articles

The muscles are listed in order of importance in the execution of the movement EXTERNAL ROTATION hamstring INTERNAL ROTATION semimebranoso semitendinoso puny sartorius popliteal gastrocnemius EXTENSION quadriceps tensor fascia lata BENDING semimebranoso semitendinoso hamstring puny sartorius popliteal gastrocnemius Upper limb Lower limb Trunk Abdomen Articles

The muscles are listed in order of importance in the execution of the movement EXTERNAL ROTATION large buttock medium and small buttock iliopsoas short, long and large lead connector piriformis sartorius pectineus external shutter internal shutter square of the femur INTERNAL ROTATION medium and small buttock tensor fascia lata great adductor across where large buttock medium and small buttock great adductor piriformis semimebranoso semitendinoso hamstring (long head) BENDING iliopsoas tensor fascia lata pectineus adductor l ungo short lead puny rectus femoris sartorius ABDUCTION buttock medium