User profiles for Ashwin G. Ramayya
 | Ashwin RamayyaUniversity of Pennsylvania Verified email at uphs.upenn.edu Cited by 1008 |
A DTI investigation of neural substrates supporting tool use
Recent functional neuroimaging and brain lesion studies have implicated a network of left
hemisphere regions in human tool use: 1) posterior middle temporal cortex involved in …
hemisphere regions in human tool use: 1) posterior middle temporal cortex involved in …
Theta and high-frequency activity mark spontaneous recall of episodic memories
Humans possess the remarkable ability to search their memory, allowing specific past
episodes to be re-experienced spontaneously. Here, we administered a free recall test to 114 …
episodes to be re-experienced spontaneously. Here, we administered a free recall test to 114 …
Human intracranial high-frequency activity during memory processing: neural oscillations or stochastic volatility?
Intracranial high-frequency activity (HFA), which refers to fast fluctuations in electrophysiological
recordings, increases during memory processing. Two views have emerged to explain …
recordings, increases during memory processing. Two views have emerged to explain …
Long-term outcomes following deep brain stimulation for Parkinson's disease
OBJECTIVE Deep brain stimulation (DBS) is an effective treatment for several movement
disorders, including Parkinson’s disease (PD). While this treatment has been available for …
disorders, including Parkinson’s disease (PD). While this treatment has been available for …
Reduced long-term cost and increased patient satisfaction with rechargeable implantable pulse generators for deep brain stimulation
FL Hitti, KA Vaughan, AG Ramayya, BJ McShane… - Journal of …, 2018 - thejns.org
OBJECTIVE Deep brain stimulation (DBS) has revolutionized the treatment of neurological
disease, but its therapeutic efficacy is limited by the lifetime of the implantable pulse …
disease, but its therapeutic efficacy is limited by the lifetime of the implantable pulse …
Resident simulation training in endoscopic endonasal surgery utilizing haptic feedback technology
Simulated practice may improve resident performance in endoscopic endonasal surgery.
Using the NeuroTouch haptic simulation platform, we evaluated resident performance and …
Using the NeuroTouch haptic simulation platform, we evaluated resident performance and …
Stimulation of the human medial temporal lobe between learning and recall selectively enhances forgetting
Background Direct electrical stimulation applied to the human medial temporal lobe (MTL)
typically disrupts performance on memory tasks, however, the mechanism underlying this …
typically disrupts performance on memory tasks, however, the mechanism underlying this …
Social determinants of health and neurosurgical outcomes: current state and future directions
The relationship between social determinants of health (SDOH) and neurosurgical outcomes
has become increasingly relevant. To date, results of prior work evaluating the impact of …
has become increasingly relevant. To date, results of prior work evaluating the impact of …
Operative strategies to minimize complications following resection of pituitary macroadenomas
Introduction We sought to identify factors associated with increased length of stay (LOS) and
morbidity in patients undergoing resection of pituitary macroadenomas. Methods We …
morbidity in patients undergoing resection of pituitary macroadenomas. Methods We …
Microstimulation of the human substantia nigra alters reinforcement learning
Animal studies have shown that substantia nigra (SN) dopaminergic (DA) neurons strengthen
action–reward associations during reinforcement learning, but their role in human learning …
action–reward associations during reinforcement learning, but their role in human learning …