Rectus Femoris

Femoral Nerve, Posterior Division Lumbar Plexus, L2, L3, L4. 

From the anterior inferior iliac spine and the brim of the acetabulum. 

On the anterior aspect of the thigh, midway between the superior border of the patella (P) and the anterior superior iliac spine (ASIS). 

If the electrode is inserted too medially and too deeply it will be in the vastus intermedius if inserted too laterally it will be in the vastus lateralis if inserted too distally and medially it will be in the vastus medialis. 

Femoral nerve (entrapment) at the inguinal ligament level 

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A muscle consists of groups of muscle bundles that join into a tendon at each end. The muscle bundles in the quadriceps are the vastus medialis, rectus femoris, vastus inter-medialis and vastus lateralis. Each bundle is separately wrapped in a sheath of connective tissue. Each muscle is composed of many fibres, packaged into bundles of about... 

The soluble substances, mild irritants and suspensions can be injected by this route in the large skeletal muscles (deltoid, triceps, gluteus maximus, rectus femoris etc.). These muscles are less richly supplied with sensory nerves and are more vascular, so irritant solutions can be injected. Small volumes (up to 2 ml) are injected into the deltoid muscle, and small or large volumes (up to 10 ml) are injected into the gluteal mass. 

Traditionally pork bundle is homemade. In this study, muscle of Rectus femoris was sliced into 20 x 10 x 10 cm3 cubes and boiled in water (100°C) for 1.5 hours to denature the muscle protein. When... 

The midanterior thigh (rectus femoris) and the middle third of the vastus lateralis are used for i.m. administration to young infants as well as to older children. These sites are better developed and larger than other muscle groups that are used for drug administration to older children or adults. The technique is shown in Fig. 

Muscle fatigue can be measured by means of the frequency spectrum, related to standard deviation, of electrical signals recorded from the muscle. The following is a list of values (in arbitrary units) for the myoelectric signal during isokinetic knee extension using the rectus femoris muscle. Compute the standard deviation. 

Herzog, W. and derKeurs, H.E.D.J., Force-length relation of in vivo human rectus femoris muscles, P. FlugensArch. 411 643-647,1988. 

Anterior inferior iliac spine (A I IS) Rectus femoris... 

Fig. 4.12. Ultrasound demonstrating avulsion (arrow) of the anterior inferior iliac spine (asterisk) which is attached to the rectus femoris tendon (arrowheads)...

Fig. 4.18. Extended field-of-view ultrasound demonstrates a mass-like organising haematoma following contusion involving the vastus inter-medius (VM) and rectus femoris (RP) muscles. The arrowheads indicate the margins of the echogenic organising haematoma which surround a fluid collection (arrow)...

Fig. 4.20. Ultrasound demonstrates a subacute grade III (full thickness) tear of the rectus femoris muscle with retraction (arrowheads). There is increased flow on power Doppler as part of a reparative process.

These are incomplete fractures with no disruption of the pelvic ring. Type A1 are avulsion fractures which commonly occur in athletic teenagers. The avulsion may be from the anterior-superior iliac spine, caused by sudden contraction of Sartorious, anterior-inferior ischial spine (rectus femoris insertion), and the pubic tubercle (pectineus insertion). 

In the pelvis, avulsion occurs primarily at six sites, which not surprisingly are the sites of the major muscle attachments. The three commonest sites are the anterior superior iliac spine (ASIS) (the origin of sartorius), the anterior inferior iliac spine (AIIS) (the rectus femoris origin) and the ischial tuberosity (the origin of the hamstring group). With these fractures acutely there is a clinical history of severe exertion, followed by pain and reduced function (Wootton et al. 1990) (Fig. 12.23). 

Fig. 12.24. Sites of pelvic avulsion injuries. A, iliac crest (abdominal muscle insertion). B, anterior superior iliac spine (sartorious muscle origin). C, anterior inferior iliac spine (rectus femoris origin). D, greater trochanter (gluteal insertions). Ey Lesser trochanter (illiopsoas). F, ischial tuberosity (hamstring muscle). G, body of pubis and inferior pubic ramus (adductors and gracillis)...

For example, the muscle Longissimus dorsi is a muscle of pork loin (cutlet) and the muscle Rectus femoris is the main muscle of pork leg (oyster piece). 

In the lower limbs the quadriceps femoris muscles are most severely affected and undergo progressive atrophy, particularly of the vastus medialis and lateralis, with relative sparing of the rectus femoris (Figure 9.2). As in the upper limbs the weakness is often more severe on the nondominant side. Weakness of the ankle dorsiflexors is also common but severe foot-drop occurs infrequently. Other muscle groups such as the hip extensors and abductors and ankle plantar flexors are usually only mildly affected. 

The hip bones give rise to many muscular attachments. Cranial to the acetabulum, the ilium also has two prominent projections on its anterior margin the anterior superior iliac spine, which may easily be visible through the skin of slender subjects, and the anterior inferior iliac spine (Fig. 12.1a). The first gives insertion to the tensor fasciae latae and sartorius, the second to the rectus femoris. Medially, the iliac fossa... 

From lateral to medial, the deep layer of anterior muscles includes the rectus femoris, the iliopsoas and the pectineus (Fig. 12.2). The rectus femoris muscle has three separate proximal tendons direct (straight), indirect and reflected. The direct tendon originates from the anterior inferior iliac spine and continues down into a superficial aponeurosis which covers the anterior aspect of the proximal muscle (superficial aponeurosis) the indirect tendon arises from the superior acetabular ridge and forms a sagittal-oriented band (central aponeurosis) that is located inside the proximal muscle belly the thin reflected tendon is directed more medially to merge... 

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