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Lab Report
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NEW FILES Cranial nerves
Lab Report Instructions:
BIOL 203 Lab Report Paper Spring 2024
Cranial Nerve Case – Part II
Mrs. Sula is a 44-year-old woman who recently presented in the emergency room after a bicycle accident. The ER nurses treated several lacerations and abrasions to the left side of Mrs. Sula’s face and her right arm. X-ray images showed a complete transverse fracture of her left wrist. The attending physician placed a cast on Mrs. Sula’s arm and proceeded to examine her for the extent of the head trauma. A CT scan of Mrs. Sula’s head confirms a small fracture to her left temporal bone that extends through the internal auditory meatus. Based on the location of the skull fracture, the physician suspects that Mrs. Sula may have damage to one or more of her cranial nerves. See Part II for the results of the physician’s exam.
The patient’s results (physician’s notes):
When asked to sniff vials of vanilla extract and coffee, the patient correctly identified the odors. An eye exam revealed that the patient’s visual acuity and peripheral vision were normal. The patient was asked to follow a penlight with her eyes as the light was moved to the patient’s right, left, up, down, and towards her nose. Both eyes tracked the light as normal. The patient was able to feel a warm or cold probe applied to her forehead, cheek, and chin. Some asymmetry of the face was noted including weakness in the eyebrows, lips, and forehead on the left side. Her left eyelid was drooping. A taste test revealed that the patient was unable to distinguish sweet and salty tastes on the anterior left side of her tongue. The patient was able to hear clearly through both ears and when a struck tuning fork was placed on her forehead she could hear it on both sides. The patient was able to walk with a normal, balanced gait and was able to balance on the left leg and the right leg. The patient’s speech and gag reflex were normal. When asked to clench her jaw, a strong and symmetrical contraction was observed.
You will use physical tests described in your lab manual to examine a control subject without any damage to the skull or cranial nerves. Use the description of the patient’s results in Part II to formulate data for an experimental subject, your injured patient. Compare the data from the control subject (your lab partner) to the data for the experimental subject (the patient) to determine what sensory or motor deficits Mrs. Sula is experiencing. Use your knowledge of the anatomy and function of each cranial nerve to determine which cranial nerve or nerves were affected by her injuries. Compare your analysis from the test results to your hypothesis that was based only on the anatomy of the injury. To write your lab report, follow the format specified on the last page of this document and use the rubric provided to guide the content.
Assignment Guidelines:
1. Although you worked with a partner while completing the lab exercise, you must write your own, individual lab report. Copying another student’s paper or portions thereof constitutes plagiarism.
2. The lab report must be typed and submitted via Canvas. Every lab report submitted will be checked by an online similarity detection program (CopyLeaks) and reviewed by the instructor. Detection of plagiarism may result in a grade of 0 and formal citation for infraction of the HCC code of conduct. Citations of references must be included in the submitted assignment. For more information on HCC’s policies on academic honesty, please see the statement on academic honesty below and the HCC student handbook.
3. Make sure to use in-text citations when quoting or paraphrasing words, phases, ideas, or data from another source. Merely rearranging the order of words and not using an in-text citation constitutes plagiarism. APA style format for in-text and full citations must be used.
4. Be as concise as possible. Be specific in your wording. The best lab reports are ones that make every word count. Strive for logic and precision and avoid ambiguity. Keep the writing impersonal; do not use first person (i.e., I or we). Don’t use Mrs. Sula’s name – she is “the patient.”
5. Proofread your report before submitting it for grading. Mistakes in grammar and spelling will factor into your final grade. Have a neutral person review and critique your report before submission. If you need help, see your instructor or go to the LAC for assistance.
6. The report needs to be written in sufficient detail so that a person with the same background as you can read the report and understand it.
7. Data must be presented in a suitable format such as a graph, table, or chart. Be sure provide appropriate labels and captions for your data figure(s).
8. Every section of this lab report - except for the data presented in a graph, table, or chart - must be written in sentence and paragraph form. Bullet points, numbered lists, diagrams, etc, are not acceptable.
Statement on academic honesty:
Academic honesty is required of every HCC student. An infraction of the academic honesty code
includes copying other students’ work or published materials. The HCC handbook states:
“Academic Honesty means the use of one’s own thoughts and materials in all academic activities… A violation of academic honesty involves misrepresentation, the submission of materials for evaluation that are not the student’s own, or fulfillment of an academic exercise that does not result from individual effort or intellectual production.
Students are expected to give full credit for the borrowing of other’s words or ideas. Intentional or unintentional use of another’s words or ideas without acknowledging this use constitutes plagiarism. There are four common forms of plagiarism:
• duplication of an author’s words without quotation marks and accurate citation and documentation;
• duplication of an author’s words or phrases with accurate citation and documentation, but without proper use of quotation marks or block indentation, as required;
• use of an author’s ideas in paraphrase without accurate citation and documentation; or
• submission of a paper in which exact words are merely rearranged even though footnoted.
Every student is expected to submit work for a course or for any other academic purpose that has been done solely for that course or for that purpose. If a student wishes to submit the same or similar work for any other course or for any other academic purpose within the college, prior written permission of the instructor of the course in which the assignment is being submitted must be obtained.
Any student intentionally aiding another student in any infraction of the academic honesty policy is considered equally responsible.”
The penalty for the first infraction of the Academic Honesty policy is to receive a zero on the assignment. The second offense may result in a failing grade for the course.
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attached are lab manual results.
Lab Report Sample Content Preview:
Title
Your Name
Subject and Section
Professor’s name
Date
Introduction
The Cranial Nerves
Twelve (12) cranial nerves are responsible for many sensations and motor functions. These are numbered from one to twelve with the following specific names, respectively: olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, spinal accessory, and hypoglossal nerves (Taylor et al., 2021).
Case Scenario
Cranial nerve examination is an essential assessment in patients who sustained trauma to the skull due to the possibility of damage as the cranial nerves exit it. In the case presented, the patient sustained a minor fracture on the left temporal bone extending to the internal acoustic meatus (IAM). This is a bony structure that lies in the petrous part of the temporal bone, and the structures that exit it include the facial and vestibulocochlear nerves, labyrinthine artery, and the vestibular ganglion (Panara & Hoffer, 2023; Sarı et al., 2024).
Objectives
The objectives of this lab report are the following:
1 To evaluate sensory and motor functions of cranial nerves using standardized neurological examination procedures as described in a lab manual and
2 To assess the degree of involvement of cranial nerves following the trauma via comparing the results of the cranial nerve testing between the control and experimental subjects
Methodology
Cranial Nerve Testing Procedure
Olfactory Nerve (CN I)
The patient’s vision shall be occluded. Each nostril shall be tested one at a time by occluding one nostril using the patient’s finger. A vanilla extract, coffee, and/or alcohol in a vial shall be presented to each of the patient’s nostrils, and the patient shall be asked to identify the odour (Taylor et al., 2021).
Optic Nerve (CN II) and Oculomotor (CN III) Nerve
To test for peripheral vision, the patient will stand in front of the examiner 12 inches away. The patient shall stare at the examiner at eye level. A pencil shall be placed on the periphery approximately 12 inches away from the patient, and the patient shall be asked to identify its presence one side at a time. Consequently, Snellen’s Chart shall be used to test for visual acuity with and without corrective lenses, respectively (Taylor et al., 2021).
To test for pupillary light reflex, the examiner will introduce light using a penlight to the right eye while observing pupillary constriction to the right and left eyes. This will be repeated to the other eye. Consequently, accommodation will be tested from far to near sight (Taylor et al., 2021).
Oculomotor (CN III), Trochlear (CN IV), and Abducens (CN VI) Nerves
The oculomotor nerve shall be tested by observing if the patient’s eye is drooping or if eye-opening is difficult. Consequently, the oculomotor, trochlear, and abducens nerves shall be tested by following an H-shape, and the examiner shall record the presence or absence of extraocular eye movements (EOMs) (Taylor et al., 2021).
Trigeminal Nerve (CN V)
To test for the sensory part, cold, warm, and light touch perceptions shall be introduced at the areas supplied by the optic, maxillary, and mandibular branches of the trigeminal nerve with the left and right sides one at a time and the motor part shall be tested by clenching the teeth and elevating the mouth. At the same time, the examiner compares the strength of the masseter and temporalis muscles, respectively (Taylor et al., 2021).
Facial Nerve (CN VII)
The patient shall be asked to perform facial expressions, and the examiner will note facial asymmetry (Taylor et al., 2021).
Vestibulocochlear Nerve (CN VIII)
To test for the cochlear branch, first, the examiner shall whisper to the patient’s ear and ask the patient to repeat the whispered phrase one ear at a time. Next, the Weber and Rinne tests will be conducted to distinguish between conductive versus sensorineural hearing loss (Michels et al., 2019).
Glossopharyngeal (CN IX) and Vagus (CN X) Nerves
The patient’s phonation shall be tested while the examiner observes the position of the uvula and palate (i.e., with deviations or lack of elevation). Additionally, swallowing and speech vocalization shall also be tested to observe for dysphagia and dysphonia (Taylor et al., 2021).
Spinal Accessor...
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