Neuroanatomy and Brain Injuries Review

The lecture initially began with a timing mix-up, as the instructor thought they were starting late.
Emphasis on starting an introduction to neuro and preparing for exam six, with a focus on final preparation.

Use of Nearpod for the introduction to neurology; regular PowerPoint for brain tumors and traumatic brain injury.
Specific login code for Nearpod: JGI2R.

Exam Schedule:
- Exam six is upcoming after the vacation, with final exams also approaching.
- Encourage early review, given how quickly April will arrive.
Instructor noted that the content for exams (particularly endocrine) is challenging, but students reported that previous exams were manageable.

Importance of assessing level of consciousness during neurological exams, using categories of:
- Time, place, person, situation.
Documentation of consciousness: A&O times four.

Conducting patient interviews to assess for symptoms: pain, numbness, tremors, balance issues, speech problems, hearing, and sight issues.
Cranial Nerves: Importance of understanding performance of cranial nerves in neurological assessments.
Importance of understanding medications, particularly their interactions in neurology.

Purpose: To assess level of consciousness in patients suspected of having brain injuries.
Scoring Categories: Eye opening, verbal response, and motor response.
Best possible score is 15; scores of 9-12 indicate possible head injury; scores below 8 indicate severe brain injury or coma.
Importance of understanding scoring criteria and monitoring for changes in GCS scores.

Regularly evaluate the GCS score during patient care to assess changing levels of consciousness.

Radiological Evaluations:
- CAT scans: Conducted in cases of suspected brain injury (hold metformin).
- MRI: Important for brain tumors and assessing structural integrity; must ensure no metal implants.
- Cerebral Angiogram: Imaging that requires contrast; observe for complications post-operatively.
- Myelogram: Invasive, involves spinal fluid analysis after injecting contrast; post-procedure management includes bed rest.
- PET Scans and EEGs: Additional options for metabolic and electrical activity assessments.

Definition: Increased ICP is a symptom, resulting from various causes such as trauma, brain tumor, or hemorrhage.
Normal ICP Range: 5-15 mmHg, measured using a ventricular catheter.
Initial Symptoms: Decreased level of consciousness, confusion, pupillary changes, weakness, projectile vomiting.
Cushing's Triad: Elevated blood pressure, bradycardia, and irregular respiratory patterns suggest severe ICP increases.

Monitor vital signs and maintain oxygen saturation levels above 94%.
Keep the head elevated at 30 degrees, avoiding hip flexion or straining that could further increase ICP.
Medications such as mannitol may be administered to reduce ICP and manage fluid status.

Definition: Abnormal growth of cells in the brain; can be benign or malignant.
Types of Brain Tumors Includes:
- Gliomas: Often confined to brain and spinal cord.
  - Astrocytomas: Usually remain localized.
  - Glioblastoma: Highly aggressive and most common malignant tumor.
- Meningiomas: Typically slow-growing and benign, but dangerous due to pressure effects.
- Acoustic Neuromas: Involves hearing/balance issues due to growth on a cranial nerve.
- Metastatic Tumors: Malignant tumors that spread to the brain from other body areas.

Triad of Symptoms: Morning headaches, vomiting (with or without nausea), and papilledema (swelling of the optic nerve). Personality changes may also occur.

Importance of family history and presenting symptoms (headache, cognitive decline, etc.).
Diagnostic Tests: MRI is the gold standard for detailing imaging.
Treatment Approaches: May include surgery (craniotomy), chemotherapy, or radiation depending on type and extent of tumor.
Post-operative care includes monitoring vital signs, consciousness levels, and addressing complications (e.g., cerebrospinal fluid leaks).

TBI typically results from primary injuries (immediate trauma) and secondary injuries (subsequent complications).
Major causes include motor vehicle accidents, sports-related trauma, and falls.

Concussion: Mild TBI, brief or no loss of consciousness; symptoms include headache and confusion.
Contusion: More severe than a concussion; actual bruising of brain tissue.
Hematoma Types:
- Subdural Hematoma: Blood under the dura; could be acute or chronic.
- Epidural Hematoma: Rapid onset, often following a loss of consciousness, requiring immediate medical intervention.

Brief loss of consciousness, potential lucid interval, and rapid decline in neurological status.

Implement neuro checks and GCS assessments.
Maintain neutral neck and head alignment, elevate head at 30 degrees, and prepare for potential intubation as needed.

Mannitol: Osmotic diuretic to manage increased ICP; works through fluid mobilization and requires close monitoring of output and electrolytes.
Emergency Focus: Ensure all assessments lead to timely interventions to prevent intracranial pressure alterations and manage patient safety effectively.