Lower Limb Flashcards
Hip Abductors
superior gluteal nerve
- glut medius
- glut min
- tensor fascia latae
Medial Rotators
superior gluteal nerve
- glut med
- glut min
- tensor fascia latae
Lateral Rotators
- obterator internus (nerve to OI)
- gemelies
- superior: nerve to OI
- inferior gem: nerve to QF
- quadratus femorus: nerve to QF
- piriformus: nerve to piriformus (some abduct abilities)
Hip Extensors
inferior gluteal nerve
- glut max
- (and hamstrings/post thigh)
Sciatic Nerve
comes through/above/below piriformus
Piriformus compression
piriformus muscle contracts around common fib divisio of sciatic nerve (foot drop)
Lateral Femoral Cutaneous Nerve
posterior div fibers
Rami: L2-L3
Fxn: sensory around ASIS
Superior Gluteal Nerve
Post Div fibers
Rami: L4-S1
Fxn: motor of glut med, min, tensor fascia latae
Inferior Gluteal Nerve
Posterior Div Fibers
Rami: L5-S2
Fxn: motor of glut max
Nerve to Piriformus
posterior div fibers
rami: S1, S2
fxn: motor to piriformus
Nerve to Obterator Internus
ant div fibers
Rami: L5-S2
Fxn: motor to obterator internus and superior gemellus
Nerve to Quadatus Femoris
Ant div fibers
Rami: L4-S1
Fxn: motor to quad fem and inferior gemellus
Poterior Femoral Cutaneous Nerve
both ant and poterior nerve fibers
Rami: S1-S3
Fxn: sensory to posterior thigh
Femoral Nerve
Terminal Nerve
Post Div Fibers
Rami: L2-L4
Innervates anterior thigh
Obterator Nerve
Terminal Nerve
Ant Div Fibers
Rami: L2-L4
Innervates: medial thigh
Tibial Nerve
Ant Div fibers
Rami: L4-S3
Innervates: Post thigh, leg, sole of foot
Common Fibular Nerve
Post Div Fibers
Rami: L4-S2
Innervates:
- anterior leg (deep fib)
- lateral leg (superficial fib)
Anterior Thigh Compartment
Fxn: hip flex/ knee ext
Nerve: Femoral Nerve
- illiopsoas (chief hip flex)
- sartorius
- quadrceps femorus
- rectus femorus
Medial Thigh Compartment
Fxn: Hip Adduction
Obterator Nerve
- adductor brevis
- adductor longus
- gracilis
- adductor magnus
- obterator exernus
Posterior Thigh Compartment
(Hamstrings)
- *Tibial nerve
- (except biceps short head)***
Hip ext + knee flxn
- semitendiousus
- semimembranosus
- biceps femoris long head
- biceps femoris short head (knee flexor only; common fibular nerve)
- adductor magnus
Popliteus Muscle
Unlocks the knee
- Rotate medial to lock the knee
- Rotate laterally to unlock the knee
pulls lateral chondyle backwards –> laterally rotates femur on the fixed tibia
Anterior Leg Compartment
Art: Ant Tib
Nerve: Posterior division fibers
Deep Fibular Nerve
Fxn: Foot Dorsiflexn; digit extension
- TA
- EDL
- EHL (deep but btwn TA and EDL in leg)
Ligaments by medial malleolus: T, D, a. v. n. H
Lateral Leg Compartment
Fibular Art
Fxn: Eversion of foot
Nerve: Superficial Fibular
- Fib Longus (lat/sup)
- Fib Brevus (deep)
Superficial Posterior Compartment
Artery: posterior tibial and fibular artery
Nerve: Tibial Nerve
Fxn: knee flex, foot plantar flexor
- Gastroc
- Soleus
- Plantaris
Deep Posterior Compartment
Art: Post Tib and Fib artery
Nerve: Tibial nerve
Fxn: foot plantar; digit flxn
- poplitieus (knee unlocking)
- TP
- FHL (starts lateral; bigger than FDL)
- FDL
Inverters
TP (and TA)
Medial Collatoral (Deltoid) Lig of Foot
Attaches to Tibia & Talus, Tibia and Calcaneus, Tibia & Navicular, Talus and Calcaneous
Fxn: provides medial support and resists EVersion
Lateral Collateral Ligament
Attaches to Fibular and Talus, Calcaneus and Fibula
Provides lateral support of ankle
Resists INversion
Spring Lig
(plantar calcaneonavicular)
Attaches to sustentaculum tali and navicular bone
Supports head of talus in TCN joing and provies elasticity to arch
Long Plantar Lig
Attaches to calcaneous, cuboid, and lateral 3 metatarsals
Provides lateral arch support to foot
Subtalar and Transverse Tarsal joints
Work together as a unit
subtalar: talus and calcaneous
transverse tarsal: talus, calcaneous, navicular
Responsible for inversion/eversion of the foot
*twising of hindfoot*
Forcible inversion of the foot: MECH OF INJURY INVOLVES MOVEMENT AT THE SUBTALAR AND TRANSVERSE TARSAL JOINTS
Talocrual Joint
Talus and distal leg bones
fxn as tenon and mortise
dorsiflexion and plantar flexion (“pure hinge”)
a high ankle sprain would be whenthe distal leg bones become separated