This document provides information about the muscles of the hip, thigh, leg, and foot. It identifies and describes the major muscle groups including the iliopsoas, quadriceps femoris, hamstrings, gluteal muscles, gastrocnemius, and tibialis anterior. For each muscle or muscle group, it indicates their origin, insertion points, and main actions, such as flexion, extension, abduction, and rotation of the thigh, leg, and foot. The document emphasizes knowing these muscles and their functions for the lab examination.
2. Anterior Muscles of the Hip
and Thigh
Iliopsoas
2 muscles: Iliacus and
psoas major
Major flexor of the
thigh
Psoas Minor
Flexor of the thigh
Sartorius
Cross legged
Shaped like an “S”
Gracilis
ADDucts the thigh
3. Quadriceps Femoris
Rectus Femoris
Most superficial muscle
Crosses the hip joint therefore is the only muscle that flexes
the thigh
Vastus (Large)
Vastus Lateralis
Lateral
Vastus Intermedius
Deep to rectus femoris
Vastus Medialis
Most medial
All these Extend the leg while only one member of the group flexes
the thigh
Patellar ligament common ligament for attachment
Inserts on the tibial tuberosity
4. Medial Muscles of the Hip and Thigh
GAP: ADDuctor muscles
Gracilis
ADDucts the thigh
ADDuctor Brevis
Shortest and is deep
ADDuctor Longus
ADDuctor Magnus
Largest of the ADDuctor muscles
Pectineus
Most proximal
5. Lateral Aspect of
the Thigh
Tensor Fasciae Latae
Lateral muscle of the thigh
Attaches to a thick band of connective
tissue
Iliotibial Band
Runs from the top of the pelvis (ilium) to the
shin bone (tibia)
Extend, ABDuct, and laterally rotate the hip.
In addition, the ITB contributes to lateral
knee stabilization
6. Posterior Muscle of
the Hip and Thigh
Gluteus Maximus
Largest gluteal muscle
Extends thigh when standing from a
sitting position
Gluteus Medius
Superficial to minimus
Gluteus Minimus
Maintaining the center of gravity
when walking
When you raise one leg to walk gravity pulls
your body in the direction of the lifted leg. On
the stationary limb medius and minimus
contract to maintain upright posture
7. Lateral Rotators
and ABDuctors of
the Thigh
“Spanking Hand”
Piriformis
Superior Gemellus
Obturator Internus
Inferior Gemellus
Quadratus Femoris
8. Hamstring Muscles
Biceps Femoris
Lateral most
Semitendinosus
Tendon-like
Semimebranosus
Medial most
Crosses the hip joint and are extensor muscles of
the thigh when walking
Also flex the leg when walking
9.
10. Muscles of the Leg:
Anterior
Tibialis Anterior
Dorsiflexion
Extensor Digitorum Longus
Lateral to tibialis anterior
Extends all digits expect the hallux
Extensor Hallucis Longus
Deep
Extends only the hallux
11. Fibula Side
of the Leg
Fibularis (Peroneus):
Fibularis Longus
Posterior & superficial
Crosses under the arch
of the foot
Fibularis Brevis
Anterior
Lateral side of foot on
5th metatarsal
12. Leg Muscles: Posterior
Gastrocnemius
Calf muscle. Most Superficial
Crosses the knee joint and flexes the
leg
Calcaneal Tendon
Plantar flexion of the foot
Soleus
Deep to gastrocnemius
No action on the leg d/t not crossing
the knee joint
Plantar flexion of the foot
Plantaris
Weak plantar flexion of the foot
13. Leg and Foot Muscle:
Posterior
Popliteus
Crosses the knee joint and unlocks the
knee
Tibialis Posterior
Major muscle deep to the soleus
Plantar flexes and inverts the foot
Flexor Digitorum Longus
Curls the toes, plantar flexes, and inverts
the foot
Flexor hallucis longus
Flexes the hallux and aids in inverting the
foot
14. Know For the Lab Examination
Locate the muscles of the Hip, Thigh, and Foot on model
Action of the muscles
Name & ID:
Hamstring muscles
Quadricep muscles
Lateral rotators
“Spanking Hand”