This is the most common type of CP and is caused by damage to the motor cortex of the brain and can occur before, during or after birth. Spasticity can affect any muscle group in the body, however, there are some patterns that can be seen in CP:
- Flexion at the elbow, wrist or fingers;
- Flexion at the hip;
- Adduction or scissoring of the thighs (this causes the legs to pull together);
- Flexion at the knees
- Equinovarus foot posture
Spasticity can also affect smaller muscle groups such as the facial muscles, tongue or vocal folds. This can result in slow oral movements, slurred speech and a tightness or hoarseness of the voice.