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Pleural effusion x-ray (left-sided)

This PA Chest X-Ray demonstrates a left sided pleural effusion. In this condition fluid collects between the parietal and visceral pleura and appears as a shadowy fluid level on the X-Ray with obliteration of the costophrenic angles. If you were to examine this patient they might be in respiratory distress from reduced oxygen uptake (so have low sats, high resp rate, possible cyanosis and accessory muscle useage) - they may have reduced chest expansion on the affected side and it would be stony dull to percussion. Fluid transmits sound poorly so breath sounds would be decreased as would vocal resonance/fremitus. Someone with consolidation may have very similar clinical findings but the underlying area of lung is almost solid due to pus from the infective process - as sounds travel well through solids they would have increased vocal fremitus which is how you can clinically differentiate between the two conditions. Clinical examination and understanding of conditions is paramount to practice effective medicine. Before you recieved this X-Ray you should be able to diagnose the condition and use the X-Ray to confirm your suspicions.  
Rhys Clement
over 9 years ago
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Abdominal X-Ray - Small bowel obstruction

Small bowel obstruction can be identified by the dilated loops of centrally placed bowel with the venae commitantes (circular bands of muscle) that span the entire width of the bowel as opposed to tenae coli in the large bowel which only span part of it.  
Rhys Clement
over 9 years ago
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Muscle relaxant drugs

Overview of muscle relaxant drugs used during anaesthesia.  
Nigel Harper
over 8 years ago
29747
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Cerebellar Neuroanatomy

Introduction Examination of the cranial nerves allows one to "view" the brainstem all the way from its rostral to caudal extent. The brainstem can be divided into three levels, the midbrain, the pons and the medulla. The cranial nerves for each of these are: 2 for the midbrain (CN 3 & 4), 4 for the pons (CN 5-8), and 4 for the medulla (CN 9-12). It is important to remember that cranial nerves never cross (except for one exception, the 4th CN) and clinical findings are always on the same side as the cranial nerve involved. Cranial nerve findings when combined with long tract findings (corticospinal and somatosensory) are powerful for localizing lesions in the brainstem. Cranial Nerve 1 Olfaction is the only sensory modality with direct access to cerebral cortex without going through the thalamus. The olfactory tracts project mainly to the uncus of the temporal lobes. Cranial Nerve 2 This cranial nerve has important localizing value because of its "x" axis course from the eye to the occipital cortex. The pattern of a visual field deficit indicates whether an anatomical lesion is pre- or postchiasmal, optic tract, optic radiation or calcarine cortex. Cranial Nerve 3 and 4 These cranial nerves give us a view of the midbrain. The 3rd nerve in particular can give important anatomical localization because it exits the midbrain just medial to the cerebral peduncle. The 3rd nerve controls eye adduction (medial rectus), elevation (superior rectus), depression (inferior rectus), elevation of the eyelid (levator palpebrae superioris), and parasympathetics for the pupil. The 4th CN supplies the superior oblique muscle, which is important to looking down and in (towards the midline). Pontine Level Cranial nerves 5, 6, 7, and 8 are located in the pons and give us a view of this level of the brainstem. Cranial Nerve 6 This cranial nerve innervates the lateral rectus for eye abduction. Remember that cranial nerves 3, 4 and 6 must work in concert for conjugate eye movements; if they don't then diplopia (double vision) results. The medial longitudinal fasciculus (MLF) connects the 6th nerve nucleus to the 3rd nerve nucleus for conjugate movement. Major Oculomotor Gaze Systems Eye movements are controlled by 4 major oculomotor gaze systems, which are tested for on the neurological exam. They are briefly outlined here: Saccadic (frontal gaze center to PPRF (paramedian pontine reticular formation) for rapid eye movements to bring new objects being viewed on to the fovea. Smooth Pursuit (parietal-occipital gaze center via cerebellar and vestibular pathways) for eye movements to keep a moving image centered on the fovea. Vestibulo-ocular (vestibular input) keeps image steady on fovea during head movements. Vergence (optic pathways to oculomotor nuclei) to keep image on fovea predominantly when the viewed object is moved near (near triad- convergence, accommodation and pupillary constriction) Cranial Nerve 5 The entry zone for this cranial nerve is at the mid pons with the motor and main sensory (discriminatory touch) nucleus located at the same level. The axons for the descending tract of the 5th nerve (pain and temperature) descend to the level of the upper cervical spinal cord before they synapse with neurons of the nucleus of the descending tract of the 5th nerve. Second order neurons then cross over and ascend to the VPM of the thalamus. Cranial Nerve 7 This cranial nerve has a motor component for muscles of facial expression (and, don't forget, the strapedius muscle which is important for the acoustic reflex), parasympathetics for tear and salivary glands, and sensory for taste (anterior two-thirds of the tongue). Central (upper motor neuron-UMN) versus Peripheral (lower motor neuron-LMN) 7th nerve weakness- with a peripheral 7th nerve lesion all of the muscles ipsilateral to the affected nerve will be weak whereas with a "central 7th ", only the muscles of the lower half of the face contralateral to the lesion will be weak because the portion of the 7th nerve nucleus that supplies the upper face receives bilateral corticobulbar (UMN) input. Cranial Nerve 8 This nerve is a sensory nerve with two divisions- acoustic and vestibular. The acoustic division is tested by checking auditory acuity and with the Rinne and Weber tests. The vestibular division of this nerve is important for balance. Clinically it be tested with the oculocephalic reflex (Doll's eye maneuver) and oculovestibular reflex (ice water calorics). Medullary Level Cranial nerves 9,10,11, and 12 are located in the medulla and have localizing value for lesions in this most caudal part of the brainstem. Cranial nerves 9 and 10 These two nerves are clinically lumped together. Motor wise, they innervate pharyngeal and laryngeal muscles. Their sensory component is sensation for the pharynx and taste for the posterior one-third of the tongue. Cranial Nerve 11 This nerve is a motor nerve for the sternocleidomastoid and trapezius muscles. The UMN control for the sternocleidomastoid (SCM) is an exception to the rule of the ipsilateral cerebral hemisphere controls the movement of the contralateral side of the body. Because of the crossing then recrossing of the corticobulbar tracts at the high cervical level, the ipsilateral cerebral hemisphere controls the ipsilateral SCM muscle. This makes sense as far as coordinating head movement with body movement if you think about it (remember that the SCM turns the head to the opposite side). So if I want to work with the left side of my body I would want to turn my head to the left so the right SCM would be activated. Cranial Nerve 12 The last of the cranial nerves, CN 12 supplies motor innervation for the tongue. Traps A 6th nerve palsy may be a "false localizing sign". The reason for this is that it has the longest intracranial route of the cranial nerves, therefore it is the most susceptible to pressure that can occur with any cause of increased intracranial pressure.  
Neurologic Exam
over 8 years ago
29840
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Sternocleidomastoid

This is a song listing all of the muscles in the upper and lower limbs that we developed to the tune of 'the element song' to help people with revision!  
Adam Bonfield
over 8 years ago
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Anatomy Revision of the Upper Limb, Lower Limb & Back

An anatomy revision guide, focused upon the upper limb, lower limb & back. Originally created in 2009 as a study aid for students at Cardiff University School of Medicine, it was substantially updated in 2010, and this Second Edition contains more detailed chapters, particularly with respect to musculature, cross-sections & relevant clinical anatomy. Further information can be found under the Preface & Introduction.  
Nima Razii
over 8 years ago
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Anatomy wikiversity quizzes

This is a link to quizzes made using Wikiversity. During a Student selected component my colleague and I experimented with wikiversity. Although the quizzes made were basic, the concept is that they can be edited and added to by anyone using them to improve them and make them more interactive. The best example are probably the shoulder muscles and lateral aspect of the hand quizzes.  
Daniel Wornham
over 8 years ago
29972
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Ophthalmology Vodcast

This vodcast is one in a series developed by Dundee PRN, a student lead initiative providing an online medical student network for Dundee. This vodcast provides an overview of the muscles of the eye, for example, how the superior rectus moves the eye down and in via the trochlear and relevant pathology. This video serves as a stand alone piece of learning but can also be re-used in a number of learning contexts and embedded into other learning resources.  
Joshua Scales
about 8 years ago
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The Abdominal Wall - Muscles of the Trunk

A slideshow on The Abdominal Wall - Muscles of the Trunk  
Mr Raymond Buick
about 7 years ago
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Muscle Power and Tone Examination

Guide to doing a clinical exam on muscle, power and tone by the clinical skills tutors at the University of Liverpool  
Mary
over 6 years ago
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Shoulder Muscles, Ligaments & Vessels - Anterior and Posterior Views

This image is part of our online anatomy trainer. We are happy to share it with the meducation community. Stop worrying about learning anatomy and start doing it the efficient way. Sign up at [www.kenhub.com](https://www.kenhub.com "www.kenhub.com") to pass your next anatomy exam with ease.  
Niels Hapke
about 6 years ago
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Shoulder Muscles

This image is part of our online anatomy trainer. We are happy to share it with the meducation community. Stop worrying about learning anatomy and start doing it the efficient way. Sign up at [www.kenhub.com](https://www.kenhub.com "www.kenhub.com") to pass your next anatomy exam with ease.  
Niels Hapke
about 6 years ago
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6
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Obliquus capitis inferior muscle - Dorsal View

This image is part of our online anatomy trainer. We are happy to share it with the meducation community. Stop worrying about learning anatomy and start doing it the efficient way. Sign up at [www.kenhub.com](https://www.kenhub.com "www.kenhub.com") to pass your next anatomy exam with ease.  
Niels Hapke
about 6 years ago
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540

Quiz of Hip Region Anatomy

This is a little quiz of the anatomy of the hip region that I made for an SGL last term. It includes a bit of muscles, bones, and vasculature.  
Julia Marr
over 5 years ago
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3
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Spinal Pathways 4 - Corticospinal Tract

http://www.handwrittentutorials.com - The fourth instalment in the Spinal Pathways series. This video looks at the course of the corticospinal tract, from the Precentral gyrus to the peripheral muscles. For more entirely FREE tutorials and accompanying PDFs visit http://www.handwrittentutorials.com  
HelpHippo.com
over 5 years ago
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3
141

ECG Interpretation - Atrio-Ventricular Block

http://www.acadoodle.com Atrial depolarisation is transmitted to the ventricular myocardium by the AV node and intraventricular conducting system. The time between the onset of atrial depolarisation and the release of depolarisation into the ventricular myocardium from the terminal branches of the conducting system is represented by the PR interval on the ECG. Dysfunction of the AV node or diffuse damage to components of the ventricular conducting system can result in a delay or even failure of transmission of atrial depolarisation into the ventricular muscle mass. This situation is referred to as atrioventricular or AV block. Three degrees of AV block are recognised. First degree AV block is defined by transmission of all P waves to the ventricular myocardium but with prolongation of the PR interval beyond the upper limit of normal on the ECG. Second degree AV block is defined by failure of conduction of some P waves into the ventricles. In third degree or 'complete' AV block, no P waves are transmitted to the ventricular myocardium. Acadoodle.com is a web resource that provides Videos and Interactive Games to teach the complex nature of ECG / EKG. 3D reconstructions and informative 2D animations provide the ideal learning environment for this field. For more videos and interactive games, visit Acadoodle.com Information provided by Acadoodle.com and associated videos is for informational purposes only; it is not intended as a substitute for advice from your own medical team. The information provided by Acadoodle.com and associated videos is not to be used for diagnosing or treating any health concerns you may have - please contact your physician or health care professional for all your medical needs.  
ECG Teacher
over 5 years ago
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Histology Part I Intro. & Epithelium

Tutorial on Human Histology and Epithelium Table of Contents: 00:00 - WinnacunnetAnatomy and Physiology 00:09 - Human Tissues 01:12 - I. EPITHELIUM 02:47 - 2. Covering and Lining 03:30 - 03:40 - 05:27 - 07:29 - 07:56 - 09:40 - 10:32 - II. MUSCLE Tissue  
Nicole Chalmers
over 5 years ago