Why Do I Feel Crooked Even When Scans Are Normal?

The Disconnect Between Sensation and Structure

One of the most frustrating experiences in musculoskeletal care — for both the clinician and the patient — is the persistent, convincing sensation that the body is asymmetric, twisted, or misaligned, despite normal or near-normal findings on imaging and physical examination. Patients describe this in various ways: one hip feels higher than the other; the spine feels rotated; the pelvis seems to sit crooked; the shoulders feel uneven. These are real, vivid sensory experiences — not imagined, not exaggerated — and the clinician who dismisses them without an explanatory framework does their patient a significant disservice. Understanding why this disconnect between felt asymmetry and objective measurement occurs requires an appreciation of how the brain constructs its sense of body position.

How the Brain Constructs Body Position Sense

The brain's sense of body position — proprioception — is not a simple relay of accurate physical measurements from the periphery. It is a constructed perception, assembled from multiple sensory inputs that are weighted, compared, and integrated in real time within the parietal cortex and cerebellum. The inputs include: mechanoreceptors in the muscle spindles (detecting muscle length and rate of change), Golgi tendon organs (detecting tendon tension), joint mechanoreceptors in the capsule and ligaments (detecting joint position and compression), cutaneous receptors in the skin (detecting contact and pressure), vestibular receptors in the inner ear (detecting head orientation relative to gravity), and visual information. Any imbalance in the quality or quantity of these inputs — asymmetric muscle tension, asymmetric joint restriction, altered skin sensation, or vestibular asymmetry — will produce a perceived asymmetry in the body's position even when the actual skeletal position is symmetrical.

The practical consequence is that the brain can be genuinely wrong about where the body is. This is not a failure of intelligence or rationality; it is a limitation of a system that constructs perception from imperfect, incomplete sensory inputs. A person with asymmetric muscle tone in the paraspinals — say, a right-side dominant thoracic rotation pattern from years of right-handed activity or right-side pain guarding — will have asymmetric spindle afferent input to the dorsal horn and cerebellum. The brain interprets this asymmetric input as physical asymmetry of position, even when an external observer (or a scan) cannot detect the positional asymmetry.

Asymmetric Muscle Tone and the Sensation of Crookedness

The most common clinical driver of the feeling of crookedness is asymmetric resting muscle tone. In any musculoskeletal presentation involving unilateral or asymmetric pain, guarding, or overuse, the paraspinal muscles, hip rotators, and thoracic muscles adapt asymmetrically — the side of pain or dominant activity develops higher resting tone and shorter resting length than the contralateral side. This asymmetric tone produces asymmetric spindle afference, which the brain interprets as asymmetric position. The patient is not reporting structural asymmetry; they are accurately reporting their proprioceptive experience, which is genuinely asymmetric — but the asymmetry is neurological rather than skeletal. Normalising the muscle tone — through manual therapy, dry needling, or progressive exercise that loads both sides equally — typically resolves the sensation of crookedness even when no positional correction was achieved.

Vestibular and Ocular Contributions

The vestibular system contributes to postural orientation sense, and subtle asymmetries in vestibular function — from prior concussion, chronic neck dysfunction (which alters the cervicocollic reflex inputs to the vestibulocerebellum), or benign positional vertigo — can produce a persistent low-grade sense of body asymmetry or rotational bias. Ocular torsion — a slight misalignment of the visual axes — similarly produces a proprioceptive sense of postural asymmetry as the brain attempts to reconcile conflicting visual and vestibular information. These contributions are most often apparent in patients whose sense of crookedness is associated with light-headedness, balance difficulty, or visual symptoms. Upper cervical manual therapy addressing the cervicocollic reflex inputs frequently improves vestibularly-mediated asymmetry sensations alongside the local musculoskeletal findings.

Management: Explaining and Treating

The most important first step is accurate explanation. The patient who understands that their sensation of crookedness reflects neurological asymmetry rather than structural damage — that scans are normal because there is nothing structurally wrong to find — is far better positioned to engage productively with treatment than the patient who believes they have an underlying alignment problem that is being missed. This education reduces catastrophising, improves movement confidence, and begins the process of central re-calibration. Manual therapy addressing the asymmetric muscle tone and joint restriction reduces the asymmetric proprioceptive drive and is often dramatically effective at improving the sensation. Progressive bilateral loading in exercise — squats, hinges, carries — provides symmetrical proprioceptive input that gradually re-calibrates the body schema over weeks to months.