Hunter's angle

Hunter’s angle. 
( A) spectra obtained from healthy control in comparison to 
( B) brain tumor --> REVERSAL OF HUNTER'S ANGLE
( C) the posterior gray matter of a patient with Alzheimer’s disease.

Hunter's angle (HA) is a term coined from a neurosurgeon, C Hunter Shelden, at Huntington Medical Research Institutes. 

He placed his comb on the spectrum at approximately a 45° angle and connected several of the peaks.

Hunter's angle is the line formed by the metabolites in MR spectroscopy.

Metabolites myo-inositol, choline, creatine, and N-acetyl aspartate (NAA) peaks are ascending in a normal spectrum, any alteration in the ascending nature of the peaks means the spectrum is abnormal.


Comments

Post a Comment

Popular posts from this blog

Neurosurgeons are mad crazy guys

Image
Neurosurgeons are mad crazy guys. You may love them, you may hate them, but its very difficult to ignore them. They are known for their rudeness, alpha male behavior, and hard work. They are considered to be sturdy people who can carry on 12 to 14 hours of surgery without complaining about it. They are never laissez-faire. They are usually the ones who carry out the tough tasks in the toughest of the times. They are known for yelling on the residents and on their colleagues if the things are not as per their requirement. Sometimes they are considered impatient too because they have a short window of time to save any patient’s life especially with the neurosurgeons dealing with the trauma in the emergency cases. They’re considered to be always ready to operate even when the anesthetics and the other show some resistance in those cases. People think that their demands are sometimes overwhelming, but believe me it is never a personal issue because most of them actually put pat
Read more

BALACLAVA HELMET DISTRIBUTION & Dejerine's onion-peel sensory loss?

Image
(A) Divisional pattern of sensory loss (B) segmental pattern of sensory loss (C) schematic diagram of the trigeminal system in the brainstem The spinal trigeminal nucleus (STN) is the longest cranial nerve nucleus, extending caudally from the medulla to the upper cervical segment 4 of the spinal cord.   Cytoarchitecturally, the STN is divided into three portions  from rostral to caudal: Pars Oralis (from the Pons to the Hypoglossal nucleus/inferior olive) Pars Interpolaris (from the Hypoglossal nucleus/inferior olive to the  obex ) Pars Caudalis (from the obex to C4) The STN has somatotopic arrangement, the central area  of the face is represented by the rostral portion of the STN, and the more outer areas of the face are represented by the caudal portion of the STN. Therefore, lesions invading the subnucleus caudalis cause onion-skin pattern sensory impairment . The onion skin distribution differs from the dermatome distribution of the peripheral branches of t
Read more

Management of Blunt Solid Organ Injuries

Image
QUESTIONS TO BE ANSWERED as per Indian Society for Trauma and Acute Care (ISTAC) Consensus Guidelines March 2021   1. Initial assessment of a patient with blunt abdominal trauma in ED.  2. Management of patients with blunt liver and splenic injuries  i. Non-operative management  ii. Operative management  iii. Role of interventional radiology  iv. In special scenarios (e.g. head injury, pregnancy etc.)  v. Complications and sequelae  3. Critical care issues in the management of patients with solid organ injury  4. Discharge protocols for patients with solid organ injury  5. Follow-up protocols for patients with solid organ injury  6. Management of patients with pancreatic injuries 1: Initial Assessment of a Patient with Blunt Abdominal Trauma 1. What should be the initial management strategy in a hemodynamically unstable patient with suspected blunt abdominal trauma (BAT)? 2. What should be the volume of the initial fluid bolus in a patient with BAT? 3. What is the role of antifibrinoly
Read more