The General Physical Examination



The General Physical Examination





Ageneral physical examination (PE) usually accompanies a neurologic examination (NE). The extent of the general PE done depends on the circumstances and may range from minimal to extensive. The general PE in a neurologic patient need not be so detailed or painstaking as in a complicated internal medicine patient, but must be complete enough to reveal any relevant abnormalities. There are many excellent textbooks on physical diagnosis that provide an extensive discussion of general PE techniques.

Even the most compulsive internist doing a “complete physical” performs an NE the average neurologist would be consider cursory. In contrast, the neurologist performs a more complete NE, but only as much general PE as the circumstances dictate. Both are concerned about achieving the proper balance between efficiency and thoroughness. The internist or other primary care practitioner would like to learn how to incorporate the NE into the general PE; the neurologist would like to incorporate as much of the general PE as possible into the NE. In fact, any NE, even a cursory one, provides an opportunity to accomplish much of the general PE simply by observation and a few additional maneuvers.

The general examination begins with observation of the patient during the interview. Even the patient’s voice may be relevant, as hoarseness, dysphonia, aphasia, dysarthria, confusion, and other things of neurologic significance may be apparent even at that early stage. An HEENT exam is a natural byproduct of an evaluation of the cranial nerves. When examining the pupils and extraocular movements, take the opportunity to note any abnormalities of the external eye and ocular adnexa, such as conjunctivitis, exophthalmos, lid retraction, lid lag, xanthelasma, or jaundice. When examining the mouth, as an extension of the general PE, search for any intraoral lesions, leukoplakia, or other abnormality. When examining the optic disc, also examine the retina for any evidence of diabetic or hypertensive retinopathy. While examining neurologic function in the upper extremities, there is ample opportunity to observe for the presence of clubbing, cyanosis, nail changes, hand deformity, arthropathy and so forth to complete the upper extremity examination portion of the general physical examination. Examining the legs and feet for strength, reflexes, sensation, and plantar responses provides an opportunity to coincidentally look at the skin and nails. Check for pretibial edema, leg length discrepancy, swollen or deformed knee or ankle joints, or any other abnormalities. Note the pattern of hair growth, any dystrophic changes in the nails, and feel the pulses in the feet. Do anything else necessary for the lower extremity portion of the general PE. An evaluation of gait and station provides a great deal of information about the musculoskeletal system. Note whether the patient has any orthopedic limitations, such as a varus
deformity of the knee, genu recurvatum, or pelvic tilt. Gait testing also provides a convenient opportunity to examine the lumbosacral spine for tenderness and range of motion. After listening for carotid bruits, it requires little additional effort to palpate the neck for masses and thyromegaly.

The NE can thus serve as a core around which a general PE can be built. At the end of a good NE, one has only to listen to the heart and lungs and palpate the abdomen to have also done a fairly complete general PE. Sometimes it is not so important to do a skillful general PE as to be willing to do any at all, as some findings are obvious if one merely takes the trouble to look. Although there is virtually no part of the general PE that may not occasionally be noteworthy in a particular circumstance, some parts of the general PE are more often relevant and important in patients presenting with neurologic complaints. The general PE as particularly relevant for neurologic patients follows.


VITAL SIGNS

Determining the blood pressure in both arms is useful in patients with suspected cerebrovascular disease, and measuring the blood pressure with the patient supine, seated, and upright may be necessary in some circumstances. The pulse rate and character are important, especially if increased intracranial pressure is suspected. A bounding pulse occurs in aortic regurgitation or hyperthyroidism and a small, slow pulse in aortic stenosis, all of which may have neurologic complications. Abnormalities of respiration, such as Cheyne-Stokes, Biot, or Kussmaul breathing may be seen in coma and other neurologic disorders. Either hyperpnea or periods of apnea may occur in increased intracranial pressure and in disturbances of the hypothalamus.


GENERAL APPEARANCE

The general appearance of the patient may reveal evidence of acute or chronic illness; fever, pain, or distress; evidence of weight loss; abnormal posture of the trunk, head, or extremities; the general level of motor activity; unusual mannerisms; bizarre activities; restlessness; or immobility. Weight loss and evidence of malnutrition may indicate hyperthyroidism, Alzheimer disease, Whipple disease, celiac disease, or amyloidosis. The body fat level and distribution, together with the hair distribution and the secondary sexual development are important in the diagnosis of endocrinopathies and disorders of the hypothalamus. Note any outstanding deviations from normal development such as gigantism, dwarfism, gross deformities, amputations, contractures, and disproportion or asymmetries between body parts.

Specific abnormal postures may occur in diseases of the nervous system. Spastic hemiparesis causes flexion of the upper extremity with flexion and adduction at the shoulder, flexion at the elbow and wrist, and flexion and adduction of the fingers; in the lower extremity there is extension at the hip, knee, and ankle, with an equinus deformity of the foot. In Parkinson disease and related syndromes there is flexion of the neck, trunk, elbows, wrists, and knees, with stooping, rigidity, masking, slowness of movement, and tremors. In myopathies there may be lordosis, protrusion of the abdomen, a waddling gait, and hypertrophy of the calves. Peripheral nerve disease may cause wrist or foot drop or a claw hand. These neurogenic abnormalities may be confused with deformities due to such things as Dupuytren contracture, congenital pes cavus, changes due to trauma or arthritis, development abnormalities, habitual postures, and occupational factors.


Head

The skull houses the brain and abnormalities of the head are common and often very important. Inspect the shape, symmetry, and size of the head, noting any apparent abnormalities or irregularities. Premature closure of cranial sutures can produce a wide variety of abnormally shaped skulls. Other deformities or developmental anomalies include hydrocephaly, macrocephaly, microcephaly, asymmetries or abnormalities of contour, disproportion between the facial and the cerebral portions,
scars, and signs of recent trauma. In children, it is informative to measure the head circumference. Dilated veins, telangiectatic areas, or port-wine angiomas on the scalp or face may overlie a cerebral hemangioma, especially when such nevi are present in the trigeminal nerve distribution.

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Jun 19, 2016 | Posted by in NEUROLOGY | Comments Off on The General Physical Examination

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