Symptom >> Internal Medicine >> Neurology

Loss of sucking reflex

Introduction
Cause
Examine
Diagnosis

Introduction

Introduction Sucking reflex is one of the innate reflections of mammals and human babies and is one of the unconditional reflexes of newborns. When the baby's lips are touched with a nipple or finger, the sucking and squirming of the lips and tongue will occur accordingly. It disappeared 3-4 months after birth and was gradually replaced by active eating action. But in sleep and other occasions, the baby will still show spontaneous sucking action for a period of time. If the neonatal sucking reflex disappears or is significantly weakened, it indicates brain lesions; if hyperthyroidism is hunger performance. There is still a suggestion of cerebral cortical dysfunction after 1 year of age.

Cause

Cause

The reflex response in infants and young children is due to the self-protection mechanism of the baby's brain to adapt to the stimulation of the body. If the baby has no reflex reaction, or the reflex reaction appears or disappears at the wrong time, there may be the following situations:

1. Mothers take inappropriate drugs or drugs before or during pregnancy.

2, cerebral palsy patients.

Examine

an examination

Related inspection

EEG examination blood routine

Sucking reflection:

1, appearance time: 0-3 months.

2, characteristics: put things into the baby's mouth will suck. After 6 weeks, the breathing, sucking and swallowing reflexes are coordinated, and feeding will become more efficient.

3, clinical manifestations: light stroke or licking the lips, immediately the contraction of the orbicularis muscle, the upper and lower lips picked up, causing "sucking" action. Normal people do not have this reflection.

Diagnosis

Differential diagnosis

Sucking reflex is an important indicator to determine whether the newborn brain is developing normally. If the two most primitive reflexes do not appear when the baby is born, the baby will have difficulties in eating and maintaining, so it may be suspected. Whether the baby has brain damage such as hypoxia, ischemia or brain lesions. However, it is necessary to undergo a detailed examination and evaluation before a diagnosis can be made. It is not that the baby does not have a kind of reflex reaction, which means that the baby is suffering from a certain disease or abnormal development.

(1) Frontal lobe lesions: The growth rate and direction of tumor growth are different, and the clinical symptoms appear different. Such as the bilateral side of the buckle back to the front of the invasion of mutism, autonomic disorders, one or both lower extremity spasms and left hand disuse, the use of consciousness disorder. Invasion of the premotor area lesions with positive strong reflexes, positive sucking reflexes, or Hoffmam signs and Babinski signs positive, the presence of frontal ataxia or psychiatric symptoms should be highly suspected of the possibility of frontal lesions.

(B) pseudo-ball paralysis: clinical manifestations of poor articulation, outbreak language. The lip sound and throat sound are ambiguous, the pronunciation is monotonous, low dumb, and blunt. Eating is difficult, and the food cannot be pushed to the pharynx. Soft palate and pharyngeal muscle paralysis appear ruminating. The soft palate disappears and the pharyngeal reflex exists, which is an important sign of pseudobulbar paralysis. It is more diagnostic in the early stage. Pseudobulbar paralysis is an upper motor neuron paralysis, so in addition to physiological brain stem reflexes active or hyperactive, there are some pathological reflexes, called pathological brainstem reflexes, which can have sucking reflexes, palmar reflexes, head reflexes, and mandibular reflexes. These reflections can be elicited without significant pyramidal or cerebral signs, making early diagnosis valuable.

(3) Alzheimer's disease: Any age can be affected after 30 years of age, no gender difference, insidious onset, forgetting is the earliest and most prominent symptom, and near memory loss is more prominent. Progressive mental decline, unresponsiveness, decreased judgment and understanding, repeated language and meaningless repetitive actions. Misconduct, excitement, exaggeration, euphoria, and loss of ability to work. In the later stage, there may be confusion, no expression, few blinks, and often tongues, sucking and tongue reflexes. Semi-flexed posture, slow movement, eventually severe dementia, bedridden, brain CT can be seen brain atrophy and ventricular enlargement.