PHENOTYPE · MOVEMENT

Movement phenotypes extend beyond hypotonia.

The record separates baseline tone and coordination from foot structure, laterality, pain, episodic change, tic-like movements, stereotypies, captured nonepileptic events, medication effects, loss of mobility, and recovery.

31 + 8 + 22 = 61positive only + positive with negative / unresolved + unreported
39 + 22 = 61source-mapped + unreported
7mapped cells with a formal-record anchor; not an additional person state

MOVEMENT PHENOTYPE

Six layers should be recorded separately.

The same person may appear in several layers. These are observed clinical forms, not mutually exclusive diagnoses.

01

Developmental motor pattern

Hypotonia, delayed gross-motor acquisition, balance and coordination differences, motor planning, endurance, and support needs.

02

Tone, posture and laterality

Hypotonia and hypertonia, asymmetric posture or weakness, unilateral foot or leg dragging, inward turning, and side-specific tightness.

03

Gait, feet, connective and orthopaedic findings

Toe walking, congenital clubfoot, flat or flat-valgus feet, tibial varus, joint laxity or hypermobility, subluxation or dislocation, toe morphology, AFOs, fracture, pain, and contracture.

04

Tics, stereotypies and complex movements

Facial or neck tic-like movements, repetitive arm or hand movements, jaw opening, posturing, scratching, and other complex movements whose classification varies by context.

05

Pain, fatigue and episodic loss

Pain-limited movement, deconditioning, state-linked weakness or postural change, episodic loss of mobility, and recovery to a prior or new baseline.

06

Oculomotor and sensory-motor output

Vision or ocular-motor findings, sensory load, body-position effects, and the difference between motor capacity and performance in a specific state.

TICS & COMPLEX MOVEMENTS

Describe the movement before assigning the label.

Tic-like, stereotyped, dystonic, compulsive, sensory-regulatory, pain-related, medication-associated, and seizure-related movements can look similar in a brief encounter.

Medication-linked observation

One deep-record history describes facial and neck tic-like movements emerging during stimulant treatment and resolving after the medicine was stopped. That time course is clinically relevant; it does not establish an ASH1L-specific adverse effect.

Event-capture control

A 24-hour ambulatory vEEG reportedly captured the person’s typical repetitive arm or hand movements and jaw opening without an electrographic seizure correlate. This classifies the captured events, not every future event.

Tourette research context

A 2022 family-based and case-control study reported an association between ASH1L variation and Tourette-syndrome susceptibility in a Han Chinese sample. It is a risk-association study, not proof that tic-like movements in ASH1L-related neurodevelopmental disorder share one mechanism.

Liu et al., 2022 ↗

FEET & LOWER LIMBS

Structure, gait, support, and bone history are different data.

STRUCTURE

Congenital unilateral clubfoot; flat or flat-valgus feet; historical tibial varus; toe webbing; altered toe or nail morphology; and relatively small feet.

GAIT & OUTPUT

Toe walking; unilateral foot or leg dragging; inward turning; asymmetric coordination; and difficulty lifting one foot.

SUPPORT

AFO use, orthopaedic high-top shoes, physiotherapy, targeted ankle support, and changes in support need across time.

BONE & CONTRACTURE

Fracture history, reduced weight-bearing, later tightness or contracture, pain, and the distinction between primary motor and secondary orthopaedic limitation.

CONNECTIVE & STRUCTURAL PHENOTYPE

Joint laxity, skin, bone, and foot structure must remain visible—and separately attributed.

The source corpus includes hypermobility or loose joints, recurrent subluxation, hEDS diagnoses, pes planovalgus or clubfoot, soft or stretchy skin, scoliosis or vertebral findings, low-trauma fracture, osteopenia, pain, and tendon injury. These features are not uniformly assessed.

What is directly recorded

One formal genetics assessment documents clinical hEDS with joint pain, subluxations or dislocations, low-trauma fractures, tendonitis, Madelung deformity, and kyphoscoliosis. Other histories range from generalized laxity to isolated structural findings.

What must stay separate

Some people have separately tracked elastopathy, autoimmune, skeletal, nutritional, mobility, or medication co-factors. A connective diagnosis or feature cannot be assigned to ASH1L without controlling those explanations.

What to measure

Standardized joint examination, pain and dislocation history, skin and wound phenotype, foot and spine assessment, fracture mechanism, bone density and mineral context, mobility, puberty, and relevant co-finding review.

CHANGE OVER TIME

Four movement stories a static examination would miss.

01

Temporary mobility loss followed by recovery

One longitudinal history contains an approximately four-month wheelchair interval followed by recovery. The record makes recovery part of the phenotype and keeps orthopedic, postictal, pain, deconditioning, medication, and neurologic explanations active.

02

Laterality that a global motor score would miss

Several records describe one-sided dragging, tightness, postural shift, or asymmetric coordination. Repeated side-specific examination and gait video can use the opposite side as an internal control.

03

Fracture, tightness and contracture over time

One record links a heel fracture to later gastrocnemius tightness or contracture and temporary benefit from physical therapy. It should not be collapsed into baseline hypotonia.

04

Formal cerebellar metabolic anchor

A formal 18F-FDG brain PET at age three documented severely reduced uptake in both cerebellar hemispheres, preserved uptake in the remainder of the brain parenchyma, and an impression of severe bilateral cerebellar hypometabolism. It is one objective finding—not a seizure study, a screening recommendation, or evidence that every motor phenotype is cerebellar.

Read the longitudinal signal map

SEX-SPECIFIC SOURCE COVERAGE

The male and female records are not equally deep.

This table reports whether the movement domain is represented in the source set. It does not compare phenotype frequency or severity.

Source domainFemale roster · N=24Male roster · N=37
Motor / tone / gait / vision
16 + 8 = 24mapped + unreported5 formal-record anchors within mapped
23 + 14 = 37mapped + unreported2 formal-record anchors within mapped

MEASUREMENT PLAN

Classify baseline, event, pain, laterality, and recovery separately.

01

Baseline examination

Tone, strength, reflexes, coordination, range of motion, pain, feet, vision, gait, and current supports.

02

Event capture

Video when safe, awareness, suppressibility, urge, rhythm, distribution, state, medication timing, and EEG only when the event phenotype supports it.

03

Within-person change

Repeat the same task and laterality measures during baseline, flare, treatment or recovery rather than relying on a global impression.

04

Targeted testing

Orthopaedic imaging, EMG or nerve studies, metabolic evaluation, sleep or seizure capture, and pain assessment according to the clinical question.

MUSCLE BIOLOGY CONTEXT

Ash1l supports myoblast fusion in mouse models, but that experiment does not establish a primary myopathy or explain every human tone, gait, fatigue, or recovery finding.

Castiglioni et al., 2018 ↗

RELATED CHAPTERS

Movement events sit beside seizure, pain, sleep, GI, and autonomic physiology.