Where this guide sits on the ladder
By now you have met the upper-motor-neuron syndrome, learned to measure tone with bedside rulers, and absorbed the uncomfortable lesson of the previous guide: not all stiffness should be reduced, because some of it is quietly doing useful work. Suppose, then, that the careful weighing of tone-management goals has already happened, and a real problem has been found — a hand that fists shut, a calf so tight the toe drags, legs too stiff to wash between. The next question is purely practical: *with what, and in what order?*
Clinicians answer it with a ladder, and the rule is to start at the bottom. The lowest rungs are conservative and reversible — stretching, positioning, splints, casts — followed by oral drugs that calm tone everywhere. Only above those sit the focal, more invasive tools you will meet in the next guide: injecting a single muscle, a pump that drips drug into the spinal fluid, surgery. This guide is the bottom of that ladder. It is the least dramatic tier and, for many people, the only one they ever need.
Keep the muscle long: stretching, positioning, splinting
The whole conservative tier rests on one quiet fact you met when you studied immobility: a muscle that is allowed to sit shortened all day adapts to that short length and grows harder to open. A spastic muscle is doubly at risk, because the overactive pull keeps it shortened by default. So the first job is not to abolish the stiffness but to deny it the chance to set — to keep the muscle long. Stretching does this actively: long, gentle, sustained holds at the point of mild tension, never a hard yank, asking the tissue to remodel back toward its old length over weeks. As before, the honest currency is time and repetition, not force.
But a stretch lasts only as long as the hand holding it; the rest of the day, gravity and the spastic pull win. This is why positioning and splinting matter so much: they hold the gain after the therapist lets go. Positioning is the simplest — laying a paralysed arm out straight rather than letting it curl, propping an ankle at ninety degrees in bed so it does not point downward over the long, still hours of night. A static splint goes further, a moulded support that locks a wrist or ankle at a chosen angle to keep the muscle stretched for hours at a time. The family of stretching, positioning, splinting and casting is gathered under the term positioning and serial casting, and together they form the front line of contracture prevention.
When a joint has already drifted toward a fixed shortening, a single splint is no longer enough, and clinicians turn to serial casting. The idea is patient and clever: cast the limb at the most-corrected angle it will comfortably tolerate, leave it for days while the tissue creeps a little longer, then remove the cast and re-apply a new one at a slightly greater stretch — and repeat, walking the joint open a few degrees at a time. There is also a moving cousin of the static splint, the dynamic splint, which carries a gentle continuous spring or elastic force rather than locking still — a soft glove tugging stiff fingers toward open all day, coaxing rather than holding.
A pill for the whole body: the oral antispasticity agents
Conservative measures keep tissues long, but they do nothing to the overactive nerve signal itself. When stiffness is spread across many muscles — both legs after a spinal-cord injury, a whole body after multiple sclerosis or severe cerebral palsy — treating each muscle by hand is impractical, and a tablet that turns tone down everywhere becomes attractive. These are the oral antispasticity agents: taken by mouth, they enter the bloodstream and dampen the nervous system's overactivity throughout the body. There are four common players, and the useful thing for a beginner is not to memorise them but to grasp *where* each one acts.
Three of the four work on the nervous system. Baclofen quiets the relay in the spinal cord, calming the reflex loops that drive the stiffness; it is often the first oral choice for spinal causes. Tizanidine turns down a different brain-and-cord pathway, also softening tone. Benzodiazepines, the old family that includes diazepam, boost the brain's natural braking signal broadly — effective, but the most sedating, and habit-forming over time. The fourth, dantrolene, is the odd one out: instead of acting on the nervous system, it works directly inside the muscle fibre, blunting the chemical step that makes the fibre contract. That makes it appealing when the brain must stay sharp — but it can quietly strain the liver, so blood tests are part of the bargain.
drug main site of action watch-outs (educational, not dosing)
baclofen spinal cord drowsiness; do NOT stop abruptly
tizanidine brain + spinal cord drowsiness, dry mouth, low blood pressure
benzodiazepines whole brain (GABA boost) most sedating; tolerance, dependence
dantrolene inside the muscle fibre generalised weakness; liver strain
shared theme: the dose that calms the tone is often the dose that
also makes the person sleepy or weak.The blunt-instrument problem: sedation, weakness, and the focal trade-off
Here is the central honesty of this whole tier. The reach that makes an oral drug attractive — it touches every muscle at once — is exactly what makes it a blunt instrument. The nervous system does not have a dial labelled "loosen only the spastic calf"; calm it enough to soften that calf and you have also calmed the muscles holding the trunk upright, the muscles that keep a weak leg stiff enough to stand on, and the alertness of the brain itself. The two side effects that follow are not unlucky accidents; they are the *same mechanism* showing its other face. Sedation — drowsiness, foggy thinking — is what happens when a brain-wide calming agent does its job a little too well. Weakness is the cruel twin: tone and strength are not cleanly separable, so the dose that loosens an overactive muscle can also sap the useful power of a healthy one.
Picture a man recovering from a stroke whose only real spasticity is in one tight calf, but who is otherwise gamely relearning to walk. Push an oral agent high enough to loosen that calf and you may find he is now too drowsy to attend therapy and too globally weak to lift his good leg — you have traded a focal problem for a systemic deficit. This is the recurring lesson of the spasticity ladder: using a *systemic* drug to fix a *focal* problem is like turning down the volume on the whole house to quiet one noisy room. Sometimes it is the only practical choice, when stiffness truly is everywhere. But when the trouble is one or two muscles, the smarter answer is a focal tool that acts only where you point it — which is exactly where the next guide goes, to injections like botulinum toxin that switch off a single muscle and leave the rest of the body untouched.
Choosing well: matching the tool to the pattern
So how does a clinician actually decide? The single most useful question is geographic: *is the stiffness focal or diffuse?* That one answer, layered on top of the goals already agreed, steers almost everything that follows. Walk through it as a sequence and the logic of the ladder becomes plain.
- Confirm there is a real goal. Revisit the previous guide's question — would reducing this tone improve hygiene, comfort, positioning, or function? If the stiffness is harmless or even useful, the best treatment may be none at all.
- Start with what is safe and reversible. Stretching, positioning, and splinting come first for everyone, because they keep the muscle long, prevent contracture, and close off no future options.
- If stiffness is diffuse — many muscles, both legs, the whole body — an oral agent earns its keep, accepting the systemic cost of some sedation or weakness as the price of broad reach.
- If stiffness is focal — one fisting hand, one dragging calf — do not punish the whole body with a pill. Hold the conservative work and step up to the focal tools of the next guide, which act only where they are aimed.
Two closing honesties. First, none of this cures the lesion: the stroke, the cord injury, the cerebral palsy that caused the overactivity is still there. Every tool on this ladder manages a symptom and buys function; it does not repair the damaged upper motor neuron. Second, these tiers are not rivals but layers. Conservative work continues even after an oral drug or, later, an injection is added — because a relaxed muscle still has to be kept long, or it will shorten the moment the relaxation wears off. The art of this rung is less about picking a single winner than about stacking gentle, reversible measures and reaching for the blunt or the sharp instrument only when, and only where, it is truly earned.