Docstoc

Thigh

Document Sample
Thigh Powered By Docstoc
					Thigh
       Anatomy Of TheThigh

• The thighs are composed of numerous muscles
  including the quadriceps (rectus femoris, rectus
  medialis, rectus lateralis, and rectus
  intermedialis). These muscles extend the knee
  and (rectus femoris only) help to flex the hip.
• The thighs also are made up of the hamstring
  muscles (biceps femoris, semitendinosus, and
  semimembranosus). These muscles help to flex
  the knee joint. Also included in the leg group are
  the adductor muscles, the abductor muscles, the
  glutes, gracillus, and sartorius.
              Hamstrings
• are actually comprised of three separate
  muscles: the Biceps Femoris,
  Semitendinosus and Semimembranosus.
• These muscles originate just underneath
  the Gluteus Maximus on the pelvic bone
  and attach on the tibia.
• The Hamstrings are primarily fast-twitch
  muscles, responding to low reps and
  powerful movements.
• primary functions of the Hamstrings are knee flexion
  (bringing the heel towards the buttocks) and hip
  extension (moving the leg to the rear).
• Semitendinosus and Semimembranosus: also known as
  the medial hamstrings. They cross the hip and the knee
  joint and are therefore involved in extending the hip and
  flexing the knee. They also assist in turning the knee
  inward (medial rotation).
• Biceps Femoris: also known as the leg biceps. Similar to
  it's cousin, the biceps brachii, as well as it's name
  suggests, the biceps femoris consists of two heads: the
  long and the short head. The long head crosses both the
  hip and the knee joint and is involved in extending the
  hip and flexing the knee. The short head only crosses
  the knee joint and is only involved in flexing the knee.
  Both heads assist in turning the foot outward (lateral
  rotation of the knee)
Posterior Thigh
Leg Curls
Straight Leg Deadlifts
     The quadriceps femoris
 (quadriceps extensor, or quads)
• includes the four muscles on the front of the thigh. It is the great
  extensor muscle of the leg, forming a large fleshy mass which
  covers the front and sides of the femur.
It is subdivided into separate portions, which have
    distinctive names.
• the middle muscle: is the rectus femoris.
• The other three lie in immediate connection with the
    body of the femur, which they cover from the trochanters
    to the condyles:
     – The muscle on the lateral side of the femur is termed
        the vastus lateralis.
     – The muscle covering the medial side is termed the
        vastus medialis.
     – The muscle in front is termed the vastus intermedius.
                                               Anterior Thigh
The quadriceps main function is to extend
the leg at the knee. This occurs during
activities such as running, jumping, kicking
and walking.
•   Squat
    Lunges
    Leg Extension
    Leg Press
    Quadricep stretch
           abductor muscles
• a group of four
  muscles located in
  the buttocks region
  on both sides of the
  body. Their names
  are: 1) Gluteus
  Maximus, 2) Gluteus
  Medius, 3) Gluteus
  Minimus, and 4)
  Tensor Fascia Lata
           Abductor Function

• to abduct or separate your legs away from the
  midline of the body. This occurs during any
  athletic movement requiring you to move from
  side to side such as playing the infield in
  baseball, defense in basketball and football, and
  ice skating.
Sartorius/Gracilis
           Sartorius is a strap muscle
           which runs obliquely across the
           front of the thigh. It is the
           longest muscle in the body. It
           runs from the anterior superior
           iliac spine to the medial surface
           of the shaft of the tibia
           Sartorius flexes both the hip
           and knee joints and laterally
           rotates the thigh:
           when these movements are
           carried out simultaneously in
           both limbs, a cross-legged
           position will result (sartor = a
           tailor).
Gracilis is the most superficial
muscle on the medial side of the
thigh. It is thin and flattened, broad
above, narrow and tapering below. It
arises by a thin aponeurosis from
the anterior margins of the lower half
of the symphysis pubis and the
upper half of the pubic arch.
The fibers run vertically downward,
and end in a rounded tendon, which
passes behind the medial condyle of
the femur, curves around the medial
condyle of the tibia, where it
becomes flattened, and is inserted
into the upper part of the medial
surface of the body of the tibia,
below the condyle.
Adductor Muscles:
adductor brevis,
adductor longus,
adductor magnus,
pectineus, and
gracilis

				
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
views:0
posted:3/6/2013
language:Unknown
pages:17