Lower limb muscles Flashcards
What muscles are in the anterior compartment of the thigh? (AKA quadriceps)
Vastus lateralis
Vastus intermedius
Vastus medialis
Rectus femoris
What is the innervation of the anterior compartment of the thigh?
Femoral nerve
What are the actions of the anterior compartment of the thigh?
Hip flexion
Hip rotation
Knee extension
What are the muscles in the medial compartment of the thigh?
Gracilis
Adductor magnus
Adductor longus
Adductor brevis
Obturator externus
What is the innervation of the medial compartment of the thigh?
Obturator nerve
What is the action of the medial compartment of the thigh?
Hip adduction
What is the common origin & attachment of the medial compartment of the thigh? (what is the exception?)
Origin: Pubic & ischial bones
Attachment: Posterior femoral shaft
Except gracilis, which attaches to the medial tibia
What are the muscles in the posterior compartment of the thigh? (AKA hamstrings)
Semitendinosis
Semimembranosis
Biceps femoris
What is the innervation of the posterior compartment of the thigh?
Sciatic nerve
What is the action of the posterior compartment of the thigh?
Hip extension
Knee flexion
What is the common attachment of the posterior compartment of the thigh? (what is the exception?)
Ischial tuberosity (except short head of biceps femoris - posterior femoral shaft)
What are the muscles of the superficial gluteal region?
Gluteus maximus
Gluteus medius
Gluteus minimus
Tensor fasciae latae
What are the actions of the superficial gluteal region? (3)
Hip abduction
Hip extension
Stabilises knee
What are the muscles of the deep gluteal region?
Piriformis
Obturator internus
Superior gemellus
Inferior gemellus
Quadratus femoris
What is the action of the deep gluteal region?
External rotation of the hip
What innervates the muscles of the superficial gluteal region? (what is the exception?)
Superior gluteal nerve
Except gluteus maximus - inferior gluteal nerve
Where is the ‘safe area’ for intramuscular injection in the buttock? Which muscle would be injected?
Upper lateral quadrant of the buttock
Gluteus medius
What muscles are in the anterior compartment of the leg?
Tibialis anterior
Extensor digitorum longus
Extensor hallucis longus
Peroneus tertius
What are the functions of the anterior compartment of the leg?
Dorsiflexion
Inversion of foot
Extend toes
What is the innervation of the anterior compartment of the leg?
Deep fibular nerve
What are the muscles in the lateral compartment of the leg?
Peroneus longus
Peroneus brevis
What is the function of the lateral compartment of the leg?
Foot eversion
What is the innervation of the lateral compartment of the leg?
Superficial fibular nerve
What is the function of the superficial posterior compartment of the leg?
Plantarflexion
(Knee flexion - plantaris and gastrocnemius)
