Anatomy: Muscles of the Lower Limb Flashcards
Which muscle is indicated by the arrow?
Plantaris
What is the function of the muscles of the posterior thigh?
Extensors of the thigh and flexors of the leg
What is the function of gluteus medius and minimus?
Abduct and medially rotate the thigh at the hip joint
Name the muscles of the medial thigh
Adductor magnus, adductor longus, adductor brevis, obturator externus, gracilis
Name the proximal attachment of sartorius
ASIS
What muscle does the inferior gluteal neuromuscular bundle supply?
Gluteus maximus
Which muscle is indicated by the arrow?
Superior gemelli
What is the distal attachment of the iliotibial tract?
Gerdy tubercle (lateral aspect of the lateral tibial condyl)
Name the proximal attachment of long head of biceps femoris
Ischial tuberosity
Which muscle is indicated by the arrow?
Iliacus
Which muscle is indicated by the arrow?
Fibularis longus
Name the muscles of the anterior thigh
Pectineus, iliopsoas (psoas major + iliacus), sartorius, quadriceps femoris
Which muscle is indicated by the arrow?
Extensor hallucis longus
What is the inferior boundary of the gluteal region?
Gluteal fold/sulcus
Which muscle is indicated by the arrow?
Soleus
If a patient’s right side of pelvis drops when the patient stands on their left leg, what does this indicate?
Weakness of the left gluteal muscles
Which muscle is indicated by the arrow?
Flexor digitorum longus
Name the proximal attachment of semimembranosus
Ischial tuberosity
Name the distal attachment of obturator femoris
Intertrochanteric crest
What is the function of gracialis?
Adduction of the thigh at the hip, weak flexion of leg at knee
Which nerve supplies the hamstring part of adductor magnus?
Tibial nerve
Name the distal attachment of semitendinosus
Medial surface of superior part of tibia
Where is the gluteal region located?
Between the back and the posterior thigh and is posterior to the pelvis
Name the proximal attachment of adductor brevis
Body of pubis and inferior pubic rami
Which nerve supplies the inferior gemelli and obturator femoris?
Nerve to quadratus femoris
What are the actions of semimembranosus?
Extend thigh, flex leg and rotate it medially when knee is flexed, can extend trunk when thigh and leg are flexed
Name the proximal attachment of iliacus
Iliac fossa
Which muscle is indicated by the arrow?
Adductor magnus
Name the distal attachment of gluteus medius
Greater trochanter of femur
Name the superficial muscles of the posterior leg
Gastrocnemius, soleus, plantaris
Name the proximal attachment of the adductor portion of adductor magnus
Inferior rami of pubis
Which muscle is indicated by the arrow?
Extensor digitorum longus
Which nerve supplies psoas major?
Anterior rami of L1-L3
What does foot drop indicate?
Reduced dorsiflexor function which typically occurs due to damage of the common fibular nerve
Name the proximal attachment of semitendinosus
Ischial tuberosity
Which muscle is indicated by the arrow?
Extensor hallucis longus
Which is the most superficial and largest gluteal muscle?
Gluteus maximus
Name the proximal attachment of extensor hallucis longus
Middle part of anterior surface of fibula and interosessous membrane
What is the action of tibialis posterior?
Plantarflexes ankle, inverts foot
Which nerve supplies the short head of biceps femoris?
Common fibular nerve
Name the distal attachment of sartorius
Superior, medial surface of the femur (via pes anserinus)
What are the actions of semimembranosus?
Extend thigh, flex leg and rotate it medially when knee is flexed, can extend trunk when thigh and leg are flexed
Which muscle is indicated by the arrow?
Tibialis anterior
What is the function of the muscles of the medial thigh?
Hip adductors
Name the distal attachment of the hamstring portion of adductor magnus
Adductor tubercle of the femur
Which muscle is indicated by the arrow?
Extensor digitorum longus
Name the proximal attachment of obturator internus
Internal surface of obturator membrane
Which two muscles make up iliopsoas?
Iliacus and psoas major
Which nerve supplies the superior gemelli and obturator internus?
Nerve to obturator internus
List the contents of the superior gluteal neuromuscular bundle
Superior gluteal artery, vein and nerve (L4, L5, S1)
Which muscle is indicated by the arrow?
Sartorius
Name the proximal attachment of flexor hallucis longus
Inferior 2/3 of posterior surface of fibula, inferior part of interosseous membrane
Name the proximal attachment of vastus lateralis, vastus intermedius and vastus medius
Shaft of femur
What is the action of flexor hallucis longus?
Flexes great toe at all joints, weakly plantarflexes angle, supports medial longitudinal arch of foot
Which nerve supplies the superficial muscles of the posterior leg?
Tibial nerve
Name the distal attachment of gastrocnemius
Posterior surface of calcaneus via calcaneal tendon
What is the distal attachment of the tensor fascia lata?
Inserts into iliotibial tract
Which muscle is indicated by the arrow?
Long head of biceps femoris
Which muscle is indicated by the arrow?
Semitendinosus
How many sole muscles are there?
11
Name the distal attachment of adductor longus
Linear aspera of the femur
Name the proximal attachment of gluteus medius
External ileum
Name the proximal attachment of obturator femoris
Ischial tuberosity
Which nerve supplies all of the muscles of the posterior thigh apart from the short head of biceps femoris?
Tibial nerve
Name the distal attachment of the adductor portion of adductor magnus
Linea aspera of the femur
Name the distal attachment of gracialis
Medial surface of the tibia
What is the function of the muscles of the lateral leg?
Evert foot and weakly plantarflex ankle
What is the function of the superficial muscles of the gluteal region?
Abduct and extend the lower limb at the hip joint
Name the distal attachment of gluteus maximus
Iliotibial tract
What is the function of the muscles of the anterior leg?
Dorsiflexors of ankle and extensors of toes
Which muscle is indicated by the arrow?
Tibialis anterior
What is the function of adductor brevis?
Adduction of the thigh
Which muscle is indicated by the arrow?
Tibialis posterior
Which muscle is indicated by the arrow?
Popliteus
What is the function of sartorius?
Flexor, abductor and lateral rotation of the hip joint, flexor of the knee joint
Which nerve supplies all the muscles of the medial thigh except for the hamstring part of adductor magnus?
Obturator nerve
Which muscle is indicated by the arrow?
Fibularis brevis
What is the lateral boundary of the gluteal region?
Greater trochanter of the femur
Which muscle is indicated by the arrow?
Pectineus
What is the function of biceps femoris?
Flexes leg and rotates it laterally when knee is flexed, extends thigh
What is the action of flexor digitorum longus?
Flexes lateral 4 digits, plantarflexes ankle, supports longitudinal arches of foot
Name the proximal attachment of psoas major
Lumbar vertebrae
Name the proximal attachment of fibularis tertius
Inferior third of anterior surface of fibula and intersseous membrane