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Welcome to Embryology lecture videos!
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The latest Messages 22
2022-06-06 20:15:08
EducaUonal objecUve: The musculocutaneous nerve innervates the major forearm flexors (eg, biceps brachii, brachialis) and coracobrachiaHs (flexes and adducts the arm) and provides sensory innervation to the lateral forearm. It is derived from the upper trunk of the brachia! plexus (C5·C7) and can be injured by trauma or strenuous upper extremity exercise.
256 views17:15
2022-06-06 08:14:02
25 voters308 views05:14
2022-06-06 08:13:02
A 20-year-old man is evaluated in the clinic for right arm weakness and numbness. He is a competitive baseball pitcher and says that he played a lot more innings than usual last week because his team made the playoffs. Since then, the patient has had difficulty using the right arm, particularty when lifting objects. He has no known history of head, neck, or upper extremity trauma. On physical examination, there is diminished strength on right elbow flexion and an absent biceps reflex.
287 views05:13
2022-06-06 02:55:04
https://t.me/studentdoctor
54 views23:55
2022-06-05 20:13:01
Educational objective: The trochlear nerve innervates the superior oblique muscle, which causes the eye to intort (internally rotate) and depress while adducted. Trochlear nerve palsy is typically traumatic or idiopathic and presents with vertical diplopia that worsens when the affected eye looks down and toward the nose (eg, walking downstairs, up-close reading). Patients may compensate by tucking the chin and tilting the head away from the affected eye.
121 views17:13
2022-06-05 08:13:01
20 voters200 views05:13
2022-06-05 08:12:01
53-year-old man comes to the office due to double vision. The patient lives in a two-story house and has had difficulty walking down stairs because he sees duplicates of every step and doesn't "know which ones are real." He does not have significant problems walking up stairs. The patient is also frustrated because he has trouble reading certain things, such as the morning newspaper and wori(-related documents. He has had no eye trauma, headache, focal weakness, or numbness. The patient has a history of hypertension and type 2 diabetes mellitus. He exercises regularly and does not use tobacco, alcohol, or illicit drugs.
190 views05:12
2022-06-04 20:12:01
Educational objective: Ulnar nerve injury most commonly occurs at the elbow and may cause sensory loss in the medial 1 Ya digits of the hand. Patients can also have an "ulnar claw" deformity with weakness on wrist flexion/adduction, finger abduction/adduction, and flexion of the fourth/fifth digits. Nerve injury at the wrist can present similarly.
203 views17:12
2022-06-04 08:11:01
29 voters259 views05:11
2022-06-04 08:11:01
A 53-year-old man is evaluated for discomfort in his right hand. A month ago he started developing an intermittent "pins and needles" sensation in the right hand that is worse at nighttime. He has no swelling, redness, or warmth in the hand. He also has no neck pain or history of trauma to the right upper extremity. The patient has smoked 1 pack of cigarettes daily for 20 years. He has worked as an accountant for the past 30 years. On physical examination, there is loss of sensation over the right fifth digit.
251 views05:11
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