When assessing the musculoskeletal system, which body areas should be palpated? Please SELECT ALL THAT APPLY.

The PERRLA acronym is a standardized clinical finding used during the neurological examination of the cranial nerves II and III. It confirms that the constrictor pupillae muscles and the ciliary body are functioning correctly. Intact accommodation reflects the eye's convergence and pupillary constriction for near vision.

A. Perforation of the tympanic membrane: This finding relates to the otoscopic examination of the middle ear and the integrity of the eardrum. It would be documented as a ruptured or perforated tympanic membrane. It has no correlation with the PERRLA neurological acronym.

B. Pupils are equal, round, reactive to light, and accommodation: This phrase is the direct definition of the PERRLA mnemonic used in clinical documentation. It indicates that the pupils are symmetrical and respond appropriately to light and distance. This is the correct clinical interpretation.

C. Breaths sounds are clear and equal bilaterally: This finding pertains to the auscultation of the respiratory system and the assessment of lung ventilation. It is typically documented as "clear to auscultation" or "CTA." It is unrelated to the visual or neurological systems.

D. Compound nevus on the left inner elbow with lesions on the skin: This describes a dermatological finding of a pigmented mole and associated skin changes. Such findings are documented under the integumentary section of a physical exam. It does not involve pupillary assessment or the eyes.

Abduction is the coronal plane movement of a limb away from the midsagittal plane of the body. This motion is facilitated by the deltoid and supraspinatus muscles at the glenohumeral joint. It is a fundamental component of the musculoskeletal examination used to assess rotator cuff integrity and joint mobility.

A. Extension: Extension involves increasing the angle between two body parts, such as moving the arm posteriorly beyond the anatomical position. It occurs in the sagittal plane rather than the coronal plane. Raising the arm out to the side does not fit the anatomical definition of extension.

B. Flexion: Flexion is a movement that decreases the joint angle, typically bringing the limb forward in the sagittal plane. Examples include lifting the arm straight ahead or bending the elbow. The movement described in the question occurs in a lateral, outward direction, which is distinct from flexion.

C. Abduction: The term abduction literally means "to lead away." In anatomy, this specifically refers to the lateral movement of a limb away from the body's midline. The action of raising the arm out to the side is the classic clinical example of shoulder abduction.

D. Internal rotation: This movement involves rotating the humerus medially toward the center of the body around its longitudinal axis. It does not involve lifting the arm away from the trunk. Internal rotation is typically tested by having the patient place their hand behind their lower back.