What is functional diagnostics?
Functional diagnostics in dogs examines how the musculoskeletal system works. The focus is not only on individual joints, but also on the interplay of muscles, joints and movement. Clinical examinations and objective movement analyses make it possible to identify functional limitations and document changes over time. While X-ray, CT or MRI show anatomical structures, functional diagnostics provides additional information about how the dog moves and uses its body.
In brief
- Imaging (X-ray, CT, MRI) shows the structure, usually at rest.
- Functional diagnostics shows movement under load.
- The two complement each other; neither replaces the other.
In detail
What does functional diagnostics in dogs include?
- Assessment of the gait at walk and trot
- Palpation of joints, muscles and spine
- Testing joint mobility
- Comparison of muscling on the left and right
- Neurological tests
- Objective gait analysis with measured values
Why is imaging alone not enough?
Because the image and the dog’s condition do not always match. There are dogs with marked changes on X-ray that move well, and dogs with unremarkable images that are lame. An X-ray is also taken at rest, often under sedation. It does not show how the dog uses the joint at trot.
When is functional diagnostics useful?
Functional examinations can be particularly helpful in unclear lameness, after orthopaedic surgery and during rehabilitation. They make it possible to document changes in movement and assess them together with clinical findings. In sporting and working dogs, repeated measurements can also be used for monitoring.
How can functional limitations be measured?
Not every change in gait can be clearly seen with the naked eye. Mild, bilateral or shifting abnormalities in particular can be difficult to judge visually. Instrumented gait analysis adds objective measured values to the clinical examination. Depending on the method, stance and swing phases, movement rhythm, symmetry or joint angles are recorded, for example. Sensor-based systems such as LupoGait make it possible to examine movement under real-world conditions. The data obtained can help document functional asymmetries and track changes after treatment or during rehabilitation. What matters is interpreting the clinical findings and movement data together. An objective gait analysis does not replace a veterinary diagnosis.
What does functional diagnostics offer in practice?
- It helps to identify functional limitations and assess them in the context of clinical or imaging findings
- It makes progress after surgery or therapy measurable
- It provides figures for discussions with owners
- It documents the condition before and after treatment
What does functional orthopaedics mean?
Functional orthopaedics looks at the musculoskeletal system as a whole. If a dog favours one limb, the load can shift to other parts of the body. Functional diagnostics therefore asks not only about the affected joint, but about the consequences for the whole dog.
When the X-ray findings do not explain the whole gait
Case study Pablo: hip dysplasia and an additional forelimb lameness
In Pablo, an eleven-month-old Rottweiler cross, X-rays showed marked hip dysplasia. However, the clinical examination also revealed lameness of the right forelimb with restricted elbow mobility. An additional gait analysis with the 12-sensor LupoGait system documented the functional abnormalities. After targeted diagnostic perineural anaesthesia of the right forelimb, the gait improved markedly.
The change could also be traced in the movement analysis. Pablo shows why structural findings and functional movement analysis should be considered together: a joint that looks abnormal on X-ray does not necessarily explain every change in the gait.
Frequently asked questions
X-rays can reveal structural changes. Functional diagnostics additionally examines how the dog moves and which functional abnormalities are present.
An objective gait analysis is suitable for dogs with unclear lameness, before and after surgery, during rehabilitation and for preventive checks in sporting and working dogs. It can provide indications of functional asymmetries and altered movement patterns, which may arise from compensation mechanisms, for example.
Functional diagnostics covers various examinations of the musculoskeletal system, such as assessing joint mobility, muscling and gait. Objective gait analysis is one possible method within functional diagnostics.
Functional examinations can reveal changes in movement that may be related to pain. However, movement data alone cannot reliably determine whether or where a dog is in pain.
For example in unclear lameness, after orthopaedic surgery, during rehabilitation or to assess changes in movement. The treating professional decides which examinations are appropriate.