This document provides an overview of the anatomy and clinical considerations related to facial nerve paralysis. It begins with a detailed description of the course and branches of the facial nerve from the brainstem through the temporal bone. It then discusses various causes of facial nerve paralysis and approaches to diagnostic testing including topodiagnostic tests and electrophysiology. Management considerations are provided for different conditions that may cause facial nerve paralysis such as Bell's palsy, Ramsay Hunt syndrome, and basal skull fracture.
facial nerve anatomy for medical students and ENT postgraduatesAugustine raj
Anatomy of facial nerve has complicated course. I have attempted to make it as simple as possible. hope you enjoy the presentation and derive precise knowledge about the same.
facial nerve anatomy for medical students and ENT postgraduatesAugustine raj
Anatomy of facial nerve has complicated course. I have attempted to make it as simple as possible. hope you enjoy the presentation and derive precise knowledge about the same.
Slides prepared and compiled by highly experienced ENT teacher, Dr. Krishna Koirala from Nepal , for teaching undergraduate and postgraduate ENT students in the field of otorhinolaryngology.
A clear and concise explanation of the basic concepts in the subject matter concerned.
He is the Head of department with a sound knowledge in the field of ENT to teach both undergraduate and postgraduate ENT students
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Slides prepared and compiled by highly experienced ENT teacher, Dr. Krishna Koirala from Nepal , for teaching undergraduate and postgraduate ENT students in the field of otorhinolaryngology.
A clear and concise explanation of the basic concepts in the subject matter concerned.
He is the Head of department with a sound knowledge in the field of ENT to teach both undergraduate and postgraduate ENT students
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
Prix Galien International 2024 Forum ProgramLevi Shapiro
June 20, 2024, Prix Galien International and Jerusalem Ethics Forum in ROME. Detailed agenda including panels:
- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
- WOMEN’S HEALTH: FERTILITY PRESERVATION
- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
ONCOLOGICAL AND INFLAMMATORY SKIN DISEASES?
- ARTIFICIAL INTELLIGENCE AND ETHICS
- GENE THERAPY
- BEYOND BORDERS: GLOBAL INITIATIVES FOR DEMOCRATIZING LIFE SCIENCE TECHNOLOGIES AND PROMOTING ACCESS TO HEALTHCARE
- ETHICAL CHALLENGES IN LIFE SCIENCES
- Prix Galien International Awards Ceremony
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
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This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
2. ANATOMY
INTRODUCTION
COURSE OF FACIAL NERVE
BRANCHES
CAUSES OF FACIAL NERVE PARALYSIS
AND THEIR MANAGEMENT
3. VII Cr Nv ; Mixed Nerve
10,000 fibers- Motor , Sensory , Parasympathetic fibers
Motor root – 7000, Special Visceral Efferent Fibers
Sensory & Parasympathetic – 3000 carried by “NERVUS
INTERMEDIUS” (Nv of Wrisberg)
NI consists of – General Visceral Efferent
– Special Visceral Afferent
– Somatic Afferent
4. 3 nuclei
1) Motor nucleus –
lower Pons below 4th
ventricle
2) Superior salivatory
nucleus – dorsal to
motor Nucleus
3) Nucleus of tractus
solitarius– medulla
oblongata
5.
6. From brainstem to fundus of IAM
Length 24mm
FN crosses CP angle with 8th CN &
NI
Devoid of epineurium
Thin layer of pia mater
Surg imp :
1) Iatrogenic trauma in CP angle
tumour surgery
2) Difficult to identify in schwannoma
(no connective tissue)
7. From fundus to
Stylomastoid foramen
Length – 28 to 30 mm
“Fallopian canal”
Longest bony canal
8. Enters in ant sup
segment of IAC
Length 5 – 12 mm
Crista falciformis
Bills bar
No separate sheath
Shares with NI & 8th CN
9. Narrowest(0.68) &
Shortest(3-5mm)
No anastomosing
arteries
Periostium is thicker
Postero-Superior to
cochlea
Antero-Medial to SSCC
Distal end – Geniculate
ganglion;1st genu
10. Surgical importance:
1) Anatomical bottle neck – ischemia in oedema
2) Part most vulnerable for ischemia (no arterial
anastomosis)
3) Temporal bone # - MC injured
Geniculate ganglion:
Bipolar gang cells
Afferent input – somatic & special visceral afferents
Secretomotor Fibers to lacrimal gland (without
synapse)
11. Horizontal segment
From GG to 2nd genu
Length – 8 to 11mm
Lies beneath LSCC &
above OW
above & medial to
“Processus cochleariformis”
13. Surgical importance:
Processus
cochleariformis(consistant
landmark)
Imp landmark for 2nd genu –
-LSCC
-Pyramidal eminence
-B/w short process of
incus(L) & LSCC(M)
14. Vertical Segment
From 2nd Genu To SMF
Longest (13mm)
segment
Landmark – “Digastric
Ridge”
15. From SMF to terminal
branches
Runs in substance of
parotid
Main trunk divides
- upper temperofacial
- lower cervicofacial
“Pes anserinus”
Superficial to
Retromandibular Vein
16. Intra temporal region :
1) GSPN
2) Nerve to stapedius
3) Chorda tympani
4) Sensory auricular
branch
17. From GG
2 types of fibers
Pregang para symp –
Pterygopalatine gang.
Post gang – lacrimal G
Sensory fibers to
nasal & palatine glands
Joins deep petrosal N
– N to pterygoid canal
19. 4mm above SMF
Lateral & anterior to Facial Nerve
Lateral to Long Process of incus & medial to malleus
2 types of fibers
1. Pre Ganglionic Parasympathetic – submandibular
gland
Post Ganglionic – submandibular & subligual Glands
2. Special sensory – anterior 2/3rd of tongue
20. Extra temporal region
1) Posterior auricular Nerve (occipito
frontalis & muscles of pinna)
2) Muscular Branches (posterior belly of
digastric & stylohyoid)
21.
22. There are three imp. issues when confronted with
facial nerve paralysis:
The cause
The site of lesion
The prognosis
A. TOPODIAGNOSTIC TESTING
B. ELECTROPHYSIOLOGY
23. TEST NERVE BRANCH
ASSESSED
1. SCHIRMER TEST Greater superficial petrosal
nerve
2. STAPEDIAL REFLEX Nerve to stapedius muscle
3. ELECTROGUSTROMETRY Chorda tympani
4. SALIVARY FLOW
TESTING
Chorda tympani
24. 1. MINIMAL NERVE EXCITABILITY TEST
2. MAXIMAL STIMULATION TEST (MST)
3. ELECTRONEURONOGRAPHY (ENoG)
4. ELECTROMYOGRAPHY (EMG)
30. Diagnostic criteria-
Paralysis or paresis of all muscle groups on one side of
the face;
Sudden onset;
Absence of signs of central nervous system disease;
Absence of signs of ear or CPA disease.
Aetiology –
Microcirculatory failure of vassa nervosum
Ischaemic neuropathy
Infectious (HSV-1,HSV-2,VZV,EBV,Influenza B)
Genetic
Immunologic
31. TREATMENT
STEROIDS
Prednisolone -1mg/kg for 5 days f/b a ten day taper.
ANTIVIRAL DRUGS
Oral Acyclovir – (200-400 mg five times a day) for ten
days.
32. Definition –
peripheral facial nerve palsy accompanied by
an erythematous vesicular rash on the ear (zoster oticus)
or in the mouth.
Mechanism -
reactivation of the latent VZV in the geniculate
ganglion
Persistent excruciating Pain and SNHL
33. TREATMENT-
If started within three days of onset = significant
improvement
Prednisolone - 1mg/kg for 5 days f/b a ten
day taper
Intravenous acyclovir (250 mg three times
daily) or oral acyclovir (800 mg five times
daily)
34. LONGITUDINAL FRACTURE
More common (80%)
Parietal blow
Conductive hearing loss
CSF otorrhoea
Facial paralysis less (20%). Delayed onset
TRANSVERSE FRACTURE
Less common (20%)
Occipital blow
SNHL
Facial paralysis more common (50%). Immediate
onset
MIXED
35. TREATMENT
Surgical exploration- goals:
a. To decompress the nerve
b. To remove bony fragments that impinge on nerve.
c. To re establish continuity in case of transaction
1. Early post injury stage–
Acute onset incomplete palsy without progression –
Medical Treatment
Acute complete paralysis /incomplete paralysis that
progresses to complete paralysis – Surgical
Exploration (ENoG shows>90%denervation within 6
days of onset)
36. 2. Late post injury stage –
Late Exploration-
• End to end anastomosis
• Interposition grafting (cable grafts- ipsilateral great
auricular nv, sural nv, medial antebrachial cutaneous
nvs)
• Rerouteing
• Reinnervation – hypoglossal facial anastomosis, cross
facial nerve grafting (using a sural nv graft)
Static or Dynamic Facial Reanimation
Procedures (if EMG findings suggest long term
denervation)
Temporalis muscle transfer
Masseter muscle transfer
37. Otology could be a dull way of life without the 7th
cranial N arrogantly swerving through the temporal
bone to the muscles of facial expression
“JOHN GROVES”