Cardiac Qs
... Sympathetic nerves act as part of the reaction to the ‘fight, fright or flight’ scenario. The nerves are distributed not only to the sinoatrial and atrioventricular nodes but also to the cardiac muscle of both ventricles and atria. The effects of sympathetic innervation can be broken down into incre ...
... Sympathetic nerves act as part of the reaction to the ‘fight, fright or flight’ scenario. The nerves are distributed not only to the sinoatrial and atrioventricular nodes but also to the cardiac muscle of both ventricles and atria. The effects of sympathetic innervation can be broken down into incre ...
A natural example of different circuit architectures for analogous
... membrane and synaptic parameters might produce relatively similar network outputs. However, there is still a general assumption that similar behaviors in related animal species originate from a common neural architecture. In this study, we show that two species produce similar behaviors using hom ...
... membrane and synaptic parameters might produce relatively similar network outputs. However, there is still a general assumption that similar behaviors in related animal species originate from a common neural architecture. In this study, we show that two species produce similar behaviors using hom ...
Neural Integration I: Sensory Pathways and the Somatic Nervous
... General versus Special Senses • The general senses describe our sensitivity to temperature, touch, pressure, vibration, pain and proprioception. They involve receptors that are relatively simple in structure and distributed throughout the body. • The special senses include hearing, smell, taste, vi ...
... General versus Special Senses • The general senses describe our sensitivity to temperature, touch, pressure, vibration, pain and proprioception. They involve receptors that are relatively simple in structure and distributed throughout the body. • The special senses include hearing, smell, taste, vi ...
Week7
... • Components of a neuron: cell body, dendrites, axon, synaptic terminals. • The electrical potential across the cell membrane exhibits spikes called action potentials. • Originating in the cell body, this spike travels down the axon and causes chemical neurotransmitters to be released at synaptic te ...
... • Components of a neuron: cell body, dendrites, axon, synaptic terminals. • The electrical potential across the cell membrane exhibits spikes called action potentials. • Originating in the cell body, this spike travels down the axon and causes chemical neurotransmitters to be released at synaptic te ...
complete_ch14_1 - Fullfrontalanatomy.com
... Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
... Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
Brain Day Volunteer Instructor Guide
... 3. Somatosensory Cortex (Parietal Lobe) àà Ensure students have a chance to complete the Touch section of their booklet ...
... 3. Somatosensory Cortex (Parietal Lobe) àà Ensure students have a chance to complete the Touch section of their booklet ...
COGNITIVE SCIENCE 107A Sensory Physiology and the Thalamus
... As the gateway to cortex, it’s believed to control how much and what type of information can get through – thus it performs a “filtering” or “gating” function and may provide a substrate for important attentional mechanisms (within and ...
... As the gateway to cortex, it’s believed to control how much and what type of information can get through – thus it performs a “filtering” or “gating” function and may provide a substrate for important attentional mechanisms (within and ...
Biological Determinants of Behaviour
... between the organizational principles and the structural components of the human brain: 1. Thalamocortical system 2. Basal ganglia system 3. Limbic System ...
... between the organizational principles and the structural components of the human brain: 1. Thalamocortical system 2. Basal ganglia system 3. Limbic System ...
A1981ME66900001
... by stimulation of the 'slow' axon were smaller than those of the 'fast' axon in accessible muscle fibers, a group of less accessible fibers showed the reverse pattern: much larger electrical events during stimulation of the 'slow' axon. These muscle fibers had distinctive membrane electrical propert ...
... by stimulation of the 'slow' axon were smaller than those of the 'fast' axon in accessible muscle fibers, a group of less accessible fibers showed the reverse pattern: much larger electrical events during stimulation of the 'slow' axon. These muscle fibers had distinctive membrane electrical propert ...
Researcher studies nervous system development
... sclerosis or epilepsy, occur. Multiple sclerosis is a disease that damages the myelin sheath on the nerve cells, creating problems for the transmission of the electrical signals. ...
... sclerosis or epilepsy, occur. Multiple sclerosis is a disease that damages the myelin sheath on the nerve cells, creating problems for the transmission of the electrical signals. ...
Intrinsic firing patterns of diverse neocortical neurons
... The term 'burst' is commonly used in the neurophysiological literature to describe a neuron's firing behavior. However, when classifying cells, the designation 'bursting cell' is ambiguous unless modified to indicate whether the firing pattern reflects an inherent property of the cell, or a direct r ...
... The term 'burst' is commonly used in the neurophysiological literature to describe a neuron's firing behavior. However, when classifying cells, the designation 'bursting cell' is ambiguous unless modified to indicate whether the firing pattern reflects an inherent property of the cell, or a direct r ...
The relative advantages of sparse versus distributed encoding for
... orthogonal vectors of length N . As each component V,, however, in the brain represents a firing rate (typically in the range between 0 and 100 spikes s-’), it is constrained to be zero or positive, and this fact sets a limit (which is much below N ) on the maximum number p of independent associatio ...
... orthogonal vectors of length N . As each component V,, however, in the brain represents a firing rate (typically in the range between 0 and 100 spikes s-’), it is constrained to be zero or positive, and this fact sets a limit (which is much below N ) on the maximum number p of independent associatio ...
Psychology study guide chapter 2 Phrenology Developed by Franz
... Neural impulse that travels down like a wave Waves move down the axon through it is only mode made up of ion exchanges moving in and out Action potential (send) when at threshold Threshold is reached when excitatory (fire!) signals out weigh don’t fire Cant fire harder or softer; either it ...
... Neural impulse that travels down like a wave Waves move down the axon through it is only mode made up of ion exchanges moving in and out Action potential (send) when at threshold Threshold is reached when excitatory (fire!) signals out weigh don’t fire Cant fire harder or softer; either it ...
Depressants and stimulants
... • THC actions: – THC binds with cannabinoid receptors, which ordinarily respond to endogenous cannabinoids. – Particularly in frontal lobe and cingulate cortex – Two known cannabinoids receptors: • anadamide • 2-arachidonyl glycerol, or 2-AG. • These receptors are found on axon terminals; ...
... • THC actions: – THC binds with cannabinoid receptors, which ordinarily respond to endogenous cannabinoids. – Particularly in frontal lobe and cingulate cortex – Two known cannabinoids receptors: • anadamide • 2-arachidonyl glycerol, or 2-AG. • These receptors are found on axon terminals; ...
bio520_JANSEN_r4 - Cal State LA
... Cell death measured by propidium iodide (PI) incorporation into damaged cells (red fluorescent signal). Critque: PI not specific for neurons (Neumann et al, 2008) ...
... Cell death measured by propidium iodide (PI) incorporation into damaged cells (red fluorescent signal). Critque: PI not specific for neurons (Neumann et al, 2008) ...
Lecture 14
... •There is evidence that a spatial frequency channel is inhibited by other channels tuned to nearby frequencies. (Also true for orientation tuning). •This is accomplished by lateral inhibitory connections within the cortex, known as lateral inhibition. •This can cause interesting effects, such as rep ...
... •There is evidence that a spatial frequency channel is inhibited by other channels tuned to nearby frequencies. (Also true for orientation tuning). •This is accomplished by lateral inhibitory connections within the cortex, known as lateral inhibition. •This can cause interesting effects, such as rep ...
Prelab 3 Nerve
... muscle, heart muscle and glands. With the exceptions of the adrenal medulla, autonomic pathways consist of a two-neuron chain (preganglionic and postganglionic neurons) extending from the CNS to the peripheral structure. It is classified according to the cells of origin in the CNS as the sympathetic ...
... muscle, heart muscle and glands. With the exceptions of the adrenal medulla, autonomic pathways consist of a two-neuron chain (preganglionic and postganglionic neurons) extending from the CNS to the peripheral structure. It is classified according to the cells of origin in the CNS as the sympathetic ...
REFLEX ARCS - Anatomy.tv
... A tendon reflex is initiated by a substantial amount of tension in a muscle tendon, and results in the reflex relaxation of the skeletal muscle attached to that tendon. It is less sensitive than the stretch reflex, but produces an opposite effect. 1. Golgi tendon organ The reflex begins when sensory ...
... A tendon reflex is initiated by a substantial amount of tension in a muscle tendon, and results in the reflex relaxation of the skeletal muscle attached to that tendon. It is less sensitive than the stretch reflex, but produces an opposite effect. 1. Golgi tendon organ The reflex begins when sensory ...
Multiplication and stimulus invariance in a looming
... receives motion-sensitive excitatory inputs while subfields B and C receive phasic inhibition related to object size. The soma lies outside of the electrical signal propagation path and spikes are generated at the point where the axon is thinnest. (B) Schematic illustration of the neuronal inputs rec ...
... receives motion-sensitive excitatory inputs while subfields B and C receive phasic inhibition related to object size. The soma lies outside of the electrical signal propagation path and spikes are generated at the point where the axon is thinnest. (B) Schematic illustration of the neuronal inputs rec ...
Editorial overview: Development and regeneration: Nervous system
... development but that their manipulation can induce regeneration. Mairet-Coello and Polleux describe several molecular pathways that contribute to Ab oligomerinduced synaptotoxicity and the potential contribution of these pathways to Alzheimer’s disease. In particular, they review the involvement of ...
... development but that their manipulation can induce regeneration. Mairet-Coello and Polleux describe several molecular pathways that contribute to Ab oligomerinduced synaptotoxicity and the potential contribution of these pathways to Alzheimer’s disease. In particular, they review the involvement of ...
Lecture 2: Structure and function of the NS
... neurons, as described in Chapters 7 and 8. The pink segments covering the axon represent the myelin sheath that coats many axons (see Figs. 1-24 and 1-30), and the gap in the axon represents a missing extent that might be as long as a meter in the longest axons. ...
... neurons, as described in Chapters 7 and 8. The pink segments covering the axon represent the myelin sheath that coats many axons (see Figs. 1-24 and 1-30), and the gap in the axon represents a missing extent that might be as long as a meter in the longest axons. ...
Stimulus (physiology)
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction. These sensory receptors can receive information from outside the body, as in touch receptors found in the skin or light receptors in the eye, as well as from inside the body, as in chemoreceptors and mechanorceptors. An internal stimulus is often the first component of a homeostatic control system. External stimuli are capable of producing systemic responses throughout the body, as in the fight-or-flight response. In order for a stimulus to be detected with high probability, its level must exceed the absolute threshold; if a signal does reach threshold, the information is transmitted to the central nervous system (CNS), where it is integrated and a decision on how to react is made. Although stimuli commonly cause the body to respond, it is the CNS that finally determines whether a signal causes a reaction or not.