The nerves supplying the lower body originate from the lumbar and sacral spine, travel through the pelvis and hip, and branch into the thigh, leg, and foot. When irritation or compression occurs at any point along these pathways, symptoms appear downstream. This is why lower back problems produce foot pain, hip compression produces thigh weakness, and knee-level nerve entrapment produces altered sensation along the shin.
Lower body nerve pain assessment, formerly known as Lower Limb Neurological Testing or LLNT, uses specific neurodynamic tests to place controlled mechanical stress through each nerve pathway. The Straight Leg Raise tests the sciatic nerve and L4-S1 nerve roots. The Prone Knee Bend and Femoral Nerve Test assess the femoral nerve and L2-L4 roots. The Slump Test evaluates the lumbosacral complex in postures that commonly reproduce sitting-related symptoms. Each test is designed to bias a specific nerve, and the response determines whether compression, irritation, or sensitisation is present.
At Myofitness, lower body nerve assessment is combined with dermatomal sensory testing, myotomal strength testing, and deep tendon reflex assessment to build a complete picture of which nerve is involved, at what level, and what the mechanism of compression or irritation is. This is what allows treatment to be accurate from the first session rather than working by elimination.
Lower limb nerve symptoms are not random. They follow predictable anatomical distributions determined by which nerve is involved and where along its course the problem lies. Identifying the nerve and the level of involvement is what makes treatment precise rather than speculative. The three major nerves assessed at Myofitness each have a defined territory, defined entrapment points, and a defined set of symptoms that arise when they are compromised.
The sciatic nerve is the largest nerve in the body, formed from the L4, L5, S1, S2, and S3 nerve roots of the lumbar and sacral spine. It travels through the buttock, passes beneath or through the piriformis muscle, and descends along the posterior thigh before dividing at the knee into the tibial and common peroneal nerves, which supply the lower leg and foot.
Because of its length and the number of structures it passes through and near, the sciatic nerve can be compressed or irritated at multiple points: at the disc level in the lumbar spine, through the piriformis in the buttock, or within the posterior thigh. Identifying the specific entrapment point determines what treatment is needed and where it needs to be applied.
True sciatica is nerve root irritation at the lumbar spine. Piriformis syndrome is sciatic nerve compression in the buttock. Both produce leg pain, but they require different clinical approaches. Lower body nerve assessment distinguishes between them through neurodynamic testing, dermatomal mapping, and myotome strength evaluation.
The femoral nerve originates from the L2, L3, and L4 nerve roots and passes beneath the inguinal ligament into the anterior thigh, where it supplies the quadriceps and the skin of the anterior thigh and medial lower leg through its saphenous branch. It is less commonly discussed than the sciatic nerve but is responsible for a significant proportion of anterior thigh pain and quadriceps weakness presentations.
Femoral nerve involvement is often missed because the symptoms, anterior thigh pain, knee weakness, and difficulty on stairs, are frequently attributed to quadriceps muscle dysfunction or patellofemoral joint problems. When these presentations do not respond to standard strengthening or joint treatment, femoral nerve assessment is the clinical step that changes the picture.
The Prone Knee Bend test and Femoral Nerve Tension Test bias the femoral nerve specifically. A positive response, where familiar anterior thigh or knee symptoms are reproduced and change with sensitising movements, confirms femoral nerve involvement and redirects treatment from the muscle to the nerve and its source.
The common peroneal nerve, also known as the common fibular nerve, branches from the sciatic nerve at the popliteal fossa behind the knee and wraps around the fibular head on the outer aspect of the knee before dividing into the superficial and deep peroneal nerves. This anatomical position makes it the most vulnerable peripheral nerve in the body to compression injury.
The superficial peroneal nerve supplies the skin over the lateral lower leg and dorsum of the foot. The deep peroneal nerve supplies the muscles that lift the foot and extend the toes. When this nerve is compressed, the first signs are often subtle: altered sensation along the outer shin or top of the foot, or a tendency to trip or catch the foot on uneven ground.
Foot drop, the inability to lift the foot during the swing phase of walking, is the most significant presentation of common peroneal nerve involvement. It is frequently misattributed to ankle weakness or ankle sprain. Neurodynamic assessment and myotome testing of the peroneal musculature identifies it correctly and determines whether the compression is at the fibular head or higher in the sciatic distribution.
Persistent neural compression does not produce static symptoms. Over time, it alters how the nervous system processes and responds to input from the affected region. The initial sharp or shooting pain, tingling, or numbness gives way to more complex changes: heightened pain sensitivity across the distribution of the nerve, muscle weakness that resists correction through exercise, coordination deficits, and movement patterns built around avoiding the painful nerve territory.
These adaptations are the nervous system’s best attempt to protect an area it perceives as under ongoing threat. They are not pathological in themselves, but they become persistent if the underlying compression is never addressed. This is why so many people with unresolved sciatica, anterior thigh pain, or foot drop find that standard soft tissue or joint treatment produces only temporary relief.
A thorough lower body nerve assessment identifies the nerve involved, the level of compression, and the degree of neural sensitisation, providing the clinical foundation for treatment that is directed at the actual driver of symptoms rather than the tissues in the vicinity of pain.
When lower body nerve assessment identifies the specific nerve involved and the level of compression, treatment is no longer speculative. Every decision about technique, direction, amplitude, and progression is informed by what the assessment found rather than by where the patient reports pain.
Treatment for lower limb nerve pain begins by reducing the mechanical load on the identified nerve. This may involve postural correction, activity modification, soft tissue work around the entrapment point, and addressing the muscular and structural contributors compressing the nerve. Where the source is spinal, lumbar decompression techniques and nerve root mobilisation are applied at the appropriate level.
Neural gliding and nerve mobilisation techniques then progressively restore the nerve’s capacity to move freely through its surrounding tissues. The amplitude, direction, and progression of these techniques are matched precisely to the nerve’s current tolerance. Strengthening of the affected myotome is introduced once the neural drive is sufficiently restored to support productive loading.
Neurodynamic testing, dermatomal assessment, myotome strength testing, and reflex evaluation combined to confirm which nerve is involved, at what level, and through what mechanism.
Address the postural, structural, and muscular factors compressing or irritating the nerve at the identified level. Modify activity to reduce ongoing provocation while treatment progresses.
Graded neural gliding techniques applied in the specific direction and amplitude appropriate to the nerve involved and its current sensitivity. Progression is guided by symptom response at each stage.
Progressive strengthening of the affected myotome, balance and coordination rehabilitation where indicated, and a return-to-activity program that builds the nerve’s capacity to tolerate load without re-sensitisation.
Serving: Flemington, Kensington, Parkville, Carlton, West Melbourne, Ascot Vale
Serving: Footscray, Kingsville, Seddon, Spotswood, Williamstown, Newport
Lower body nerve pain assessment at North Melbourne, Yarraville, and Surrey Hills. No referral required. Same-week appointments usually available.
