pectineus muscle

Information about pectineus muscle

Pectineus
The pectineus and nearby muscles
Structures passing behind the inguinal ligament. (Pectineus visible at bottom right.)
Latinmusculus pectineus
subject #128 472
Origin:Pubis - superior ramus
Insertion:Lesser trochanter, linea aspera
Artery:Obturator artery
Nerve:Femoral nerve, sometimes obturator nerve
Action:Thigh - flexion, adduction, medial rotation
Dorlands/Elsevier m_22/12550120
The pectineus muscle is a flat, quadrangular muscle, situated at the anterior part of the upper and medial aspect of the thigh.

Action

It is one of the muscles primarily responsible for hip flexion. It also adducts and medially rotates the thigh.

Innervation

Innervation is by the femoral nerve (L2 and L3) and occasionally a branch of the obturator nerve.

Origin and insertion

It arises from the pectineal line of the pubis and to a slight extent from the surface of bone in front of it, between the iliopectineal eminence and tubercle of the pubis, and from the fascia covering the anterior surface of the muscle; the fibers pass downward, backward, and lateralward, to be inserted into a the pectineal line of the femur which leads from the lesser trochanter to the linea aspera.

Additional images


Right hip bone. External surface.

Structures surrounding right hip-joint.

Muscles of the iliac and anterior femoral regions.

Deep muscles of the medial femoral region.

The left femoral triangle.

The lumbar plexus and its branches.


External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.



 •  • [ e]
Muscles of lower limbs
ILIAC REGION/ILIOPSOASpsoas major - psoas minor - iliacus
BUTTOCKSgluteals: (maximus, medius, minimus) - tensor fasciae latae
lateral rotator group: piriformis - obturator externus - obturator internus - inferior gemellus - superior gemellus - quadratus femoris
THIGHanterior compartment: sartorius - quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) - articularis genu
medial compartment/adductor: gracilis - pectineus - adductor brevis - adductor longus - adductor magnus
posterior compartment/hamstring: biceps femoris - semitendinosus, semimembranosus
LEGanterior compartment: tibialis anterior - extensor hallucis longus - extensor digitorum longus - fibularis tertius
posterior compartment: superficial - calf/triceps surae (gastrocnemius, soleus) - plantaris deep - popliteus - tarsal tunnel (flexor hallucis longus - flexor digitorum longus - tibialis posterior)
lateral compartment: fibularis muscles (longus - brevis)
FOOTdorsal - extensor digitorum brevis - extensor hallucis brevis
plantar first layer - abductor hallucis - flexor digitorum brevis - abductor digiti minimi
plantar second layer - quadratus plantae - lumbrical muscle
plantar third layer - flexor hallucis brevis - adductor hallucis - flexor digiti minimi brevis
plantar fourth layer - dorsal interossei - plantar interossei
The inguinal ligament is a band running from the pubic tubercle to the anterior superior iliac spine. Its anatomy is very important for operating on hernia patients.

It forms the base of the inguinal canal which is the place from where the inguinal hernia develops.
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Latin}}} 
Official status
Official language of: Vatican City
Used for official purposes, but not spoken in everyday speech
Regulated by: Opus Fundatum Latinitas
Roman Catholic Church
Language codes
ISO 639-1: la
ISO 639-2: lat
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bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
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Pubis may refer to the following:
  • Pubis (bone)
  • Mons pubis, a padding of fat that protects the pubis bone

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Superior ramus can refer to:
  • Superior ramus of the ischium
  • Superior pubic ramus

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bold refer to the diagram at right.)

In the skull (8):
  • 1-9. cranium
  • 7. mandible
''In the middle ears (6):
  • malleus
  • incus
  • stapes
In the throat (1):
  • hyoid
In the shoulder girdle (4):
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The lesser trochanter (small trochanter) of the femur is a conical eminence, which varies in size in different subjects

It projects from the lower and back part of the base of the neck.
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The linea aspera is a ridge of roughened surface on the posterior aspect of the femur, to which are attached muscles and intermuscular septa.

Its margins diverge above and below.
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Arteries are muscular blood vessels that carry blood away from the heart.[1] All arteries, with the exception of the pulmonary and umbilical arteries, carry oxygenated blood.

The circulatory system is extremely important for sustaining life.
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The obturator artery passes antero-inferiorly (forwards and downwards) on the lateral wall of the pelvis, to the upper part of the obturator foramen, and, escaping from the pelvic cavity through the obturator canal, it divides into both an anterior and a posterior branch.
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  • Accessory nerve
  • Accessory obturator nerve
  • Alderman's nerve
  • Anococcygeal nerve
  • Ansa cervicalis
  • Anterior interosseous nerve
  • Anterior superior alveolar nerve
  • Aortic plexus
  • Auerbach's plexus
  • Auriculotemporal nerve
  • Axillary nerve

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The femoral nerve, the largest branch of the lumbar plexus, arises from the dorsal divisions of the second, third, and fourth lumbar nerves. It descends through the fibers of the Psoas major, emerging from the muscle at the lower part of its lateral border, and passes down between
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The obturator nerve arises from the ventral divisions of the second, third, and fourth lumbar nerves; the branch from the third is the largest, while that from the second is often very small.
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Kinesiology is the scientific study of the anatomy, physiology, and mechanics of body movement, especially in humans. [1] The word kinesiology is derived the Greek "kinesis" (motion) + the suffix -ology or -logy from the greek "logos" or "logia"(meaning a field of study).
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flexion is a position that is made possible by the joint angle decreasing. The skeletal (bones, cartilage, and ligaments) and muscular (muscles and tendons) systems work together to move the joint into a "flexed" position.
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Adduction is a movement which brings a limb - arm or leg - closer to the sagittal plane of the body. It is opposed to abduction.

This term is also used when one speaks about the operation of the muscle in anatomy or musculature.
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Elsevier, the world's largest publisher of medical and scientific literature, forms part of the Reed Elsevier group. Based in Amsterdam, the company has substantial operations in the UK, USA and elsewhere.
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MUSCLE (multiple sequence comparison by log-expectation) is public domain, multiple sequence alignment software for protein and nucleotide sequences.
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In humans the thigh is the area between the pelvis and buttocks and the knee. Anatomically, it is part of the lower limb.

The single bone in the thigh is called the femur.
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The femoral nerve, the largest branch of the lumbar plexus, arises from the dorsal divisions of the second, third, and fourth lumbar nerves. It descends through the fibers of the Psoas major, emerging from the muscle at the lower part of its lateral border, and passes down between
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The obturator nerve arises from the ventral divisions of the second, third, and fourth lumbar nerves; the branch from the third is the largest, while that from the second is often very small.
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The pecten pubis or pectineal line of the pubis is a ridge on the superior ramus of the pubic bone.

The pecten pubis forms part of the pelvic brim.

Lying across it are fibers of the pectineal ligament and the proximal origin of the pectineus muscle.
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iliopectineal eminence (or iliopubic eminence, or iliopectineal line), which marks the point of union of the ilium and pubis.

It constitutes a lateral border of the pelvic inlet.
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Pubis may refer to the following:
  • Pubis (bone)
  • Mons pubis, a padding of fat that protects the pubis bone

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On the posterior surface of the femur, the intermediate ridge or pectineal line is continued to the base of the lesser trochanter and gives attachment to the pectineus muscle.

This article was originally based on an entry from a public domain edition of Gray's Anatomy.
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The lesser trochanter (small trochanter) of the femur is a conical eminence, which varies in size in different subjects

It projects from the lower and back part of the base of the neck.
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The linea aspera is a ridge of roughened surface on the posterior aspect of the femur, to which are attached muscles and intermuscular septa.

Its margins diverge above and below.
..... Click the link for more information.
GPnotebook is a British medical database for general practitioners (GPs).[1] It is an online encyclopaedia of medicine that provides an immediate reference resource for clinicians worldwide. The database consists of over 30,000 pages of information.
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Loyola University Chicago is a private co-educational religious-affiliated university established in Chicago in 1870 as Saint Ignatius College. It was founded by the Roman Catholic religious order of the Society of Jesus and bears the name of the Jesuit patron, Saint Ignatius of
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The State University of New York Health Science Center at Brooklyn, better known as SUNY Downstate Medical Center, is an academic medical center and is the only one of its kind in the Borough of Brooklyn in New York City.
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