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motor neurons carrying the signal from the precentral gyrus down through the internal capsule, through the cerebral peduncle, and into the medulla. In the medullary pyramid, the corticospinal tract decussates and becomes the lateral corticospinal tract. The nerve signal will continue down the lateral corticospinal tract until it reaches spinal nerve L4. At this point, the nerve signal will synapse from the upper motor neurons to the lower motor neurons. The signal will travel through the anterior root of L4 and into the anterior rami of the L4 nerve, leaving the spinal cord through the lumbar plexus. The posterior division of the L4 root is the femoral nerve. The femoral nerve innervates the quadriceps femoris, a fourth of which is the rectus femoris. When the rectus femoris receives the signal that has traveled all the way from the medial side of the precentral gyrus, it contracts, extending the knee and flexing the thigh at the hip.
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Rectus femoris strain, referred to as hip flexor strain, is an injury commonly at the tendon that attaches to the patella or in the muscle itself. The injury is usually a partial tear, but could be a full tear. The injury is caused by a forceful movement related to sprinting, jumping, or kicking and
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The neurons for voluntary thigh contraction originate near the summit of the medial side of the precentral gyrus (the primary motor area of the brain). These neurons send a nerve signal that is carried by the corticospinal tract down the brainstem and spinal cord. The signal starts with the upper
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is common in sports like football or soccer. The rectus femoris is prone to injury, since it crosses both the knee and the hip. Symptoms include a sudden sharp pain at the front of the hip or in the groin, swelling and bruising, and an inability to contract the rectus femoris with a full tear.
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Similarly, the rectus femoris is not dominant in knee extension when the hip is flexed since it is already shortened and thus suffers from active insufficiency. In essence: the action of extending the knee from a seated position is primarily driven by the
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The muscle ends in a broad and thick aponeurosis that occupies the lower two-thirds of its posterior surface, and, gradually becoming narrowed into a flattened tendon, is inserted into the base of the
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The two unite at an acute angle and spread into an aponeurosis that is prolonged downward on the anterior surface of the muscle, and from this the muscular fibers arise.
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are the flexors of the thigh at the hip. The rectus femoris is a weaker hip flexor when the knee is extended because it is already shortened and thus suffers from
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In the other extreme, the muscle's ability to flex the hip and extend the knee can be compromised in a position of full hip extension and knee flexion, due to
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A Rare Form of Soccer Injury – Rectus
Femoris Tendon Rupture – Orthopaedic Information | Singapore
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Rectus
Femoris Strain (“Hip Flexor Strain”) | Dr. David Geier – Sports Medicine Simplified
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Muscles of the iliac and anterior femoral regions. (Rectus femoris visible near center.)
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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Esser, Stephan; Jantz, David; Hurdle, Mark F.; Taylor, Walter (July 2015).
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It arises by two tendons: one, the anterior or straight, from the
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The rectus femoris is situated in the middle of the front of the
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in shape, and its superficial fibers are arranged in a
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Anatomy and
Physiology: The Unity of Form and Function
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484:The Rectus femoris tendon can cause a fragment of
589:. Orthopaedic.com.sg. Retrieved on 2015-09-30.
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539:"Function of the Rectus Femoris Muscle"
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510:This article incorporates text in the
298:(deep to the rectus femoris), and the
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1060:Lateral intermuscular septum of thigh
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1065:Medial intermuscular septum of thigh
444:, and less by the rectus femoris.
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428:than it will the rectus femoris.
156:lateral femoral circumflex artery
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496:that can affect young athletes.
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454:The rectus femoris is a direct
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1550:Anterior compartment of thigh
486:anterior inferior iliac spine
367:anterior inferior iliac spine
122:Anterior inferior iliac spine
1247:Fibularis (peroneus) muscles
1127:Fibularis (peroneus) tertius
605:Journal of Athletic Training
1421:Flexor digiti minimi brevis
518:of the 20th edition of
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573:Geier, David (2011-01-18)
262:Anatomical terms of muscle
1555:Muscles of the lower limb
1545:Muscles of the quadriceps
1351:Extensor digitorum brevis
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1122:Extensor digitorum longus
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617:10.4085/1052-6050-50.2.13
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154:Descending branch of the
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1346:Extensor hallucis brevis
1117:Extensor hallucis longus
1377:Flexor digitorum brevis
1213:Flexor digitorum longus
337:. Its functions are to
219:musculus rectus femoris
1411:Flexor hallucis brevis
1382:Abductor digiti minimi
1208:Flexor hallucis longus
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788:Lateral rotator group
466:Clinical significance
449:passive insufficiency
290:. The others are the
280:rectus femoris muscle
33:Rectus femoris muscle
776:Tensor fasciae latae
424:, and the remaining
422:tensor fasciae latae
410:active insufficiency
400:The rectus femoris,
1293:Intermuscular septa
577:. drdavidgeier.com.
333:) down to the deep
282:is one of the four
141:as one of the four
1438:Plantar interossei
1218:Tibialis posterior
950:External obturator
880:Vastus intermedius
819:External obturator
814:Internal obturator
696:Muscles of the hip
564:, Saladin, 5th ed.
442:vastus intermedius
306:(knee cap) by the
296:vastus intermedius
284:quadriceps muscles
143:quadriceps muscles
27:Muscle in the quad
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1471:Inferior extensor
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1416:Adductor hallucis
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892:Articularis genus
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809:Superior gemellus
804:Inferior gemellus
799:Quadratus femoris
537:Elizabeth Quinn.
490:Avulsion fracture
480:Avulsion fracture
341:the thigh at the
308:quadriceps tendon
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137:Inserts into the
16:(Redirected from
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55:Pronunciation
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1095:compartments
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1016:Femoral ring
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708:Iliac region
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546:. Retrieved
543:Verywell Fit
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387:Nerve supply
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231:A04.7.02.018
218:
1535:Hip flexors
1462:retinacula
1147:Superficial
1043:Fascia lata
725:Psoas minor
721:Psoas major
426:hip flexors
418:psoas major
335:aponeurosis
323:bipenniform
208:Identifiers
1524:Categories
1313:Transverse
865:Quadriceps
824:Piriformis
548:2022-07-23
500:References
460:hamstrings
456:antagonist
371:acetabulum
288:human body
197:Antagonist
126:acetabulum
1428:4th layer
1406:3rd layer
1389:2nd layer
1367:1st layer
1308:Posterior
1225:Popliteus
1183:Plantaris
1137:Posterior
945:Pectineus
910:Hamstring
902:Posterior
860:Sartorius
716:Iliopsoas
700:human leg
660:PTCentral
625:1062-6050
406:iliopsoas
402:sartorius
361:Structure
202:Hamstring
183:extension
133:Insertion
1466:Peroneal
1303:Anterior
1104:Anterior
960:Adductor
955:Gracilis
852:Anterior
742:Buttocks
643:25978099
516:page 470
396:Function
319:fusiform
317:; it is
1514:Anatomy
1360:Plantar
1239:Lateral
980:Minimus
769:Minimus
759:Maximus
730:Iliacus
634:4532190
458:to the
414:iliacus
381:patella
357:joint.
353:at the
304:patella
286:of the
190:flexion
175:Actions
50:Details
1500:Portal
1481:Flexor
1450:Fascia
1339:Dorsal
1269:Fascia
1257:Brevis
1252:Longus
1166:Soleus
992:Fascia
975:Magnus
970:Brevis
965:Longus
937:Medial
764:Medius
641:
631:
623:
524:(1918)
471:Strain
440:, and
404:, and
347:extend
331:rectus
294:, the
150:Artery
117:Origin
838:Thigh
514:from
327:Latin
315:thigh
266:[
255:22430
214:Latin
163:Nerve
1331:Foot
1194:Deep
698:and
639:PMID
621:ISSN
355:knee
349:the
339:flex
278:The
243:2614
226:TA98
180:Knee
1090:Leg
629:PMC
613:doi
351:leg
343:hip
250:FMA
238:TA2
187:hip
1526::
637:.
627:.
619:.
609:50
607:.
603:.
541:.
451:.
436:,
420:,
416:,
383:.
373:.
329::
310:.
185:;
99:ər
1502::
1092:/
840:/
790::
723:/
688:e
681:t
674:v
645:.
615::
551:.
270:]
108:/
105:s
102:ɪ
96:m
93:ɛ
90:f
87:ˈ
82:s
79:ə
76:t
73:k
70:ɛ
67:r
64:ˈ
61:/
20:)
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