Task performed by healthcare professionals to assess neurology functions rapidly.
Includes inspection of the oral cavity and pharynx to check for signs of infection and to assess cranial nerve function.
Anatomical Underpinnings
Central Nervous System (CNS) and Neurological Exam
Major sections:
Mental Status Exam
Cranial Nerve Exam
Sensory Exam
Motor Exam
Coordination Exam (Includes gait analysis)
Hemorrhagic Stroke
Effects of Hemorrhage
Blood accumulation in the cerebrum (illustrated in Figure 16.4) causes brain disfigurement, impacting functions.
Example: CT scan shows intraparenchymal hemorrhage in the parietal lobe.
Types of Cortical Areas
Cerebral Cortex Processing Regions
Primary Areas: Initial processing of sensory information and emergence of motor commands.
Association Areas: Adjacent to primary areas, process modality-specific inputs.
Multimodal Integration Areas: Where modality-specific regions meet; process multiple modalities or similar functions (e.g., spatial processing in vision).
Language Areas in the Brain
Broca's and Wernicke’s Areas
Key integration areas for language function in the cerebral cortex.
Located in the left hemisphere; connected through deep white matter.
Visual Acuity Assessment
Snellen Chart
Used to measure visual acuity by presenting varying sizes of letters.
Example: 20/200 vision corresponds to larger letters legible at 200 feet.
Pituitary Gland and Vision
Pituitary Tumor Effects
Located below the optic chiasm; tumors can cause tunnel vision by pressing on optic fibers.
Saccadic Eye Movements
Definition
Rapid movements of the eyes to track moving stimuli or to survey complex visual fields.
Common behaviors illustrated by gaze concentration on facial features.
Vestibulo-ocular Reflex
Functionality
Coordinated eye movements corresponding to head turns to maintain visual fixation.
Dermatomes
Topographic Skin Regions
The skin is divided into areas correlated with sensory nerve endings related to specific spinal nerves.
Sleep Cycle Overview
Stages of Sleep:
Non-REM Sleep:
Stages 1-4, characterized by changes in heartbeat, breathing, and muscle relaxation.
REM Sleep:
Brain activity resembles waking state, includes vivid dreaming and rapid eye movements.
Memory Processing in the Brain
Key Brain Regions for Memory:
Prefrontal Cortex: Crucial for short-term and working memory, acting in immediate behavioral planning.
Hippocampus: Essential for encoding short-term into long-term memories (episodic). Damage leads to amnesia.